1 Gymshark Fitness clothing retailer Solihull Jul-19 156.20% 18,565 176,164 420 Will donate £175,000 to the Birmingham Women’s and Children’s hospital via its #NHSsweatyselfie campaign

2 Northern Gas and Power Energy management consultancy Gateshead Dec-18 116.63% 8,383 29,616 285 Staff are supporting local NHS hospitals, helping to arrange delivery of vital products

3 Plimsoll Productions TV show producer Bristol Aug-19 116.12% *7,345 *37,284 149 Its documentaries have won Baftas and Emmys

4 Invenio Business Solutions IT consultancy Reading Mar-19 102.85% 7,517 32,950 727 It has been helping the Fijian government launch an online taxation service

5 Vashi Diamond jewellery retailer Central London Dec-18 97.90% 6,916 20,666 55 Has temporarily closed its jewellery stores but continues to offer its engraving services online

6 Clipfine Construction logistics Central London May-19 97.79% 10,086 90,607 186 It has halted work on a key construction project and donated protective gear to the NHS

7 Spencer Ogden Recruitment consultancy Central London Dec-19 97.10% *5,327 *36,759 452 Helping to recruit temporary and remote-working staff for clients during the pandemic

8 Orbis Protect Vacant property and staff security West London Mar-19 93.82% *3,699 *33,639 432 Providing coronavirus deep clean and decontamination services for the NHS and care homes

9 STATS Group Pipeline engineering services Aberdeenshire Dec-18 93.01% 4,505 43,425 230 Last month it announced a major expansion in Oman, but has restricted travel due to the pandemic

10 Metaswitch Communications technology North London Aug-19 89.86% 24,601 140,281 839 Is developing software to manage a long-term increase in remote working

11 BAP Pharma Pharmaceuticals supplier Slough Dec-18 89.46% 6,453 77,142 14 Due to some border closures, is finding alternative ways to ship drugs used in clinical trials

12 EnerMech Engineering services provider Aberdeen Dec-18 88.78% *32,775 *408,725 2,959 Has implemented strict protocols at its energy projects to prevent the spread of the coronavirus

13 Aspen Pumps Pump manufacturer Eastbourne Dec-18 85.88% 11,696 63,866 178 Sold a million pumps in 2019 and has donated to a foodbank during the pandemic

14 ACC Aviation Aviation services provider Surrey Dec-18 84.90% 8,187 135,322 41 Offering help with urgent repatriation, evacuation and cargo flights during the pandemic

15 SmartSearch Anti-fraud technology developer West Yorkshire Dec-19 81.68% *3,700 *10,400 98 Is switching customers to electronic document verification when physical presentation of ID is not possible

16 Ede Homes Housebuilder Oxfordshire Oct-18 78.56% 3,835 12,863 21 With physical viewings on hold, its new homes can be viewed in detail by customers on its website

17 Marshall Amps Amp manufacturer Milton Keynes Dec-18 77.57% 7,793 40,097 476 It has cancelled its annual live music festival at the Marshall Arena in Milton Keynes on June 6

18 Complete Utilities Utilities provider and engineer Gloucester Jul-19 77.35% 4,988 34,347 195 This firm tunnelled under the River Severn to lay fibre-optic cable

19 ExcelRedstone IT infrastructure provider Central London Mar-19 75.70% 6,492 100,649 661 Has been advising customers about the use of its secure remote-working services

20 S&R London Plastering services provider St Albans Aug-18 75.07% 4,373 17,344 28 Its projects include what it says will be the tallest residential building in Europe, near Canary Wharf

21 CG Fry & Son Housebuilder Dorchester Dec-18 74.75% 9,508 82,713 175 It has stopped work on its 10 development sites in Cornwall, Devon, Dorset, Somerset and Wiltshire

22 Thatchers Cider Cider producer Somerset Aug-18 74.43% 9,375 100,750 252 Is helping local residents collect shopping and prescriptions, and is delivering free school meals

23 Commsworld Telecom services provider Edinburgh Dec-19 72.80% *3,074 *24,127 100 Is using its website to share insights and advice on remote working technology

24 Bamboo Distribution Handset supplier and recycler Hertfordshire Jun-19 72.58% 3,843 52,139 90 Has donated 250 smartphones with a value of £70,000 to the NHS

25 General Traffic Vehicle parts retailer Bolton Dec-18 72.52% 3,611 35,115 405 Temporarily closed all its operations on March 31 to protect its staff

26 CAE Technology Services IT reseller Watford Jun-19 71.89% 3,855 132,913 275 Installed wi-fi in Mulberry's luxury handbag shops around the world

27 Acorn Insurance Specialist motor insurer Liverpool Dec-18 69.22% 30,702 64,840 722 With its call centre receiving a large number of enquiries, it is directing customers to its online service

28 Collinson Benefits and loyalty provider Central London Apr-19 69.21% 38,809 1,013,737 2082 The curtailment of air travel has seen it temporarily close some airport lounges

29 Oil Salvage Waste collection and fuel delivery Liverpool Dec-18 68.83% 3,628 18,644 68 Recycles waste oil that would otherwise be sent to landfill

30 Veezu Taxi hire provider Newport Dec-18 68.81% 4,911 31,338 316 Running grocery and takeaway food collection schemes and offering frontline NHS staff a 20% discount

31 Portview Fit-out contractor Belfast Nov-18 67.38% 10,268 52,339 86 Has donated several thousand surplus face masks to the Northern Ireland Hospice

32 Payen Payment services provider Guildford Mar-19 66.13% 3,631 14,211 26 A lottery operator in Sub-Saharan Africa uses the company’s platform to prevent money laundering

33 GRITIT Winter gritting specialist Surrey Sep-18 65.75% 4,530 24,448 129 Counts the NHS among its customers and continues to provide services during the lockdown

34 Solarcentury Solar power developer Central London Mar-19 65.52% 13,963 100,222 185 5% of profits go to SolarAid, a charity helping provide solar lighting to homes in Africa

35 Trace Group Software developer Central London May-19 64.30% 4,082 20,847 169 Has offered free online training sessions to clients using its property management software remotely

36 Send For Help Lone-worker protection provider Southwest London Mar-19 64.18% 4,732 15,241 111 Says it is helping to protect thousands of key workers during the coronavirus pandemic

37 PureGym Gym operator Leeds Dec-19 64.06% *68,171 *254,940 1212 Has temporarily closed all its gyms and suspended membership payments

38 Canagan Pet food supplier Buckinghamshire Mar-19 63.95% 5,862 29,579 26 Continues to deliver pet food to pet stores and homes

39 Reflex Vehicle hire provider Loughborough Dec-18 63.75% 3,920 31,399 76 Has introduced a coronavirus continuity programme to help clients

40 Tropic Skincare Beauty products manufacturer Croydon Jun-19 62.66% 6,423 34,943 147 It is working to produce 50,000 hand sanitisers and 10,000 packs of balm for NHS staff and key workers

41 Thomas Hardy Holdings Contract bottler Warrington Sep-18 62.08% 3,734 20,079 123 Can bottle up to 30 million cases of alcoholic and non-alcoholic beverages a year

42 Anglia Electrical equipment distributor Cambridgeshire Dec-18 62.04% 7,136 66,944 145 Its coronavirus task force has been working to get parts to firms designing and building ventilators

43 Amelia Knight Cosmetics designer and manufacturer Cheshire Dec-18 61.82% 4,510 31,455 328 It has donated hand sanitiser, protective gloves and face masks to health workers and charities

44 Harman Technology Photography products developer Cheshire Dec-18 60.54% 3,127 21,192 192 Named after an early photography pioneer, it can trace its roots back to the 19th century

45 Star Tissue Hygiene paper manufacturer Blackburn Sep-19 60.28% 3,267 29,367 116 Can manufacture 1,000 paper rolls a minute and has reported a “surge” in orders

46 Braidwater Group Housebuilder County Londonderry Mar-19 58.10% 4,285 34,904 65 Growth-capital firm BGF has invested three times in the past five years

47 Cennox Banking automation services Surrey Dec-18 57.46% 4,277 73,971 694 Services, installs and secures cash machines for blue-chip clients worldwide

48 Bluecube Seating manufacturer North London Dec-18 57.37% 3,431 15,256 9 Has installed more than one million seats in excess of 300 venues across 39 countries

49 Emerson & Renwick Production machinery manufacturer Lancashire Dec-18 56.46% 3,060 36,367 169 Founded in 1918, it makes machinery for producing wallpaper and for printing electronic devices

50 Exclaimer Email-signature software developer Farnborough Sep-19 55.31% ‡*8,200 *17,461 89 It has expanded capacity in its data centres to ensure it offers a resilient service

51 Lowe Rental Fridge and catering rental County Antrim Aug-19 54.92% *6,230 *33,440 260 NHS kitchens, under pressure due to Covid-19, are using its equipment

52 Grenade Sports nutrition brand Solihull Dec-18 53.86% *7,000 *44,169 48 Has been delivering packs of its products to frontline NHS staff

53 PX Group Energy infrastructure services Stockton-on-Tees Mar-19 53.29% 6,562 230,720 427 Says its teams are “working around the clock” to ensure power supplies are secure during the pandemic

54 Regatta Outdoor clothing distributor Manchester Jan-19 52.98% *24,393 *260,109 1,760 Its online store is offering a 20% discount to NHS workers

55 Laings Jewellery and watch retailer Glasgow May-19 52.64% 4,144 42,440 151 This sixth-generation family business was re-merged in 2017 after being split up in 2005

56 La Fosse Associates Recruitment consultancy Central London Dec-18 52.52% 4,711 108,350 171 Is conducting video interviews, which it says are quicker to arrange than face-to-face

57 Motor Parts Direct Motor parts retailer Essex Dec-18 51.52% 5,702 90,358 1,123 Staff are supplying car parts to independent garages for vital repairs to vehicles used by key workers

58 Pickering Interfaces Electronic testing and measurement Essex Dec-18 51.34% 3,423 19,354 188 Says it has “substantial financial resources to withstand long periods of disruption”

59 NG Bailey Mechanical and electrical contractor West Yorkshire Mar-19 50.86% 20,600 555,700 3,224 Part of the team that transformed Harrogate Convention Centre into an NHS Nightingale hospital

60 Riverford Organic produce retailer Devon Apr-19 50.79% 3,006 68,089 699 It is currently putting new customers on a waiting list after a surge in demand for its organic veg boxes

61 Pricecheck Consumer goods supplier Sheffield Apr-19 50.64% 4,281 81,644 155 Has donated £1,000 of hand cream to a local cancer charity to help its staff cope with intensive washing

62 Dotmatics Data management software Hertfordshire Dec-18 50.42% 4,249 21,485 162 Scientists continue to have full access to its cloud-based data and tools when working from home

63 Options Financial technology provider Central London Dec-18 50.11% 4,925 70,850 210 Has raised more than £145,000 to help frontline medical staff in Belfast, London and New York

64 Wireless Logic Technology platform provider Berkshire Apr-19 49.57% *20,262 *67,405 154 It has remote-working capabilities in place for the vast majority of its staff

65 Pure Retirement Specialist mortgage broker Leeds Dec-18 49.35% 10,177 24,520 81 Is conducting desktop home valuations as it responds to the restrictions on the housing market

66 Matchroom Sport Sporting events promoter Essex Jun-19 48.97% 29,521 192,882 87 Has pledged to give up to 200 free tickets to NHS staff to future boxing events as a “thank you”

67 Hyperion Insurance Group Insurance broker and underwriter Central London Sep-18 47.54% 107,748 578,888 4,332 Is supporting the Alzheimer Society’s emergency appeal and matching employee charity donations globally

68 The Trade Centre Group Car dealer West Glamorgan Nov-18 46.94% 22,434 257,365 524 It has closed all its showrooms until further notice, but is providing essential repairs for key workers

69 OCL Facades Building facade contractor Essex Jun-19 45.67% 6,215 53,311 52 Worked on Newfoundland Tower, a 220m-tall residential skyscraper in Canary Wharf