Commuters at London Waterloo might have guessed it already, but new figures from the Office of Rail and Road (ORR) have confirmed it: it's still Britain's busiest station.

Annual passenger numbers reached over 99m in one year (99.1m for 2015/16), ahead of Victoria and Liverpool Street stations, which were the second and third busiest stations respectively.

The capital dominates Britain's 10 busiest stations, with Birmingham New Street sneaking into seventh place. Overall, it was estimated that there were over 2.9bn entries and exits at all rail stations in Great Britain in 2015-16, up five per cent on last year.

Work is going on by Network Rail and South West Trains to boost capacity at the station by 30 per cent.

Read more: Waterloo Station is getting a revamp and this is what it will look like

Becky Lumlock, route managing director at Network Rail, said: "Passenger numbers are at their highest level since the Victorian era and are continuing to grow, so it is vital that we keep investing and deliver a better Wessex route. The £800m investment is the biggest package of improvements for passengers using Waterloo for decades."

It will provide five additional platforms at Waterloo as well as extended platforms for longer trains between Waterloo and Reading, new trains between Waterloo and Windsor and longer trains on London Suburban services. Part of the work to boost capacity will be delivered between 5 to 28 August 2017 where nine platforms will be closed.

Read more: London Underground has its busiest day ever

Top 10 busiest stations in Britain

Top 10 busiest stations in London