A Brexit Party MEP has prompted derision after complaining that Britain will have no representation at EU level after it leaves.

June Mummery, one of the party's 29 representatives elected to the European Parliament last year, suggested the loss of MEPs would make it hard to hold Brussels to account.

"The big question now is, who will be here to hold these people to account while they still control Britain’s waters, but the UK has no representation?" she tweeted.

Britain will lose its MEPs, EU commissioner and seats on the EU council after Brexit – leaving it with no control over the bloc's polices or political direction.

However, because of the EU's dominant position in international trade, its policies are expected to have a significant impact on the UK even after Brexit.

The UK will also be directly bound to EU rules during the transition period until 2021, while Brussels has said any trade agreement will likely require some level of permanent alignment on Britain's part.

Ms Mummery's comments prompted an immediate reaction from across the political spectrum.

"If only somebody hadn’t lied and said there was no accountability, maybe people would have voted differently," said SNP MP Peter Grant.

Dr Charles Tannock, a former Conservative MEP from the party's pro-EU wing, joked: "Surely our British fish under UK sovereign control swimming in UK exclusive economic zone will respect true Brexit and stay out of EU common fisheries policy waters so all will be well?"

Lib Dem MEP Jane Brophy said: "It took a long time but finally a Brexit MEP realised what Brexit means. I fear for our country and all the people that are in for a big shock."

Bizarre: Boris Johnson drives 'Brexit' digger through boxes Show all 8 1 / 8 Bizarre: Boris Johnson drives 'Brexit' digger through boxes Bizarre: Boris Johnson drives 'Brexit' digger through boxes Conservative party leader Boris Johnson drives a JCB through a fake wall POOL/AFP via Getty Images Bizarre: Boris Johnson drives 'Brexit' digger through boxes Prime Minister Boris Johnson during a visit to JCB cab manufacturing centre in Uttoxeter, while on the General Election campaign trail. PA Photo. Picture date: Tuesday December 10, 2019. See PA story POLITICS Election. Photo credit should read: Stefan Rousseau/PA Wire Stefan Rousseau PA Bizarre: Boris Johnson drives 'Brexit' digger through boxes Britain's Prime Minister and Conservative party leader Boris Johnson drives a Union flag-themed JCB, with the words "Get Brexit Done" inside the digger bucket, through a fake wall emblazoned with the word "GRIDLOCK", during a general election campaign event at JCB construction company in Uttoxeter, Staffordshire, on December 10, 2019. - Britain will go to the polls on December 12, 2019 to vote in a pre-Christmas general election. (Photo by Ben STANSALL / POOL / AFP) (Photo by BEN STANSALL/POOL/AFP via Getty Images) BEN STANSALL AFP via Getty Bizarre: Boris Johnson drives 'Brexit' digger through boxes Prime Minister Boris Johnson sits in a cab of a JCB during a visit to its cab manufacturing centre in Uttoxeter, while on the General Election campaign trail. PA Photo. Picture date: Tuesday December 10, 2019. See PA story POLITICS Election. Photo credit should read: Stefan Rousseau/PA Wire Stefan Rousseau PA Bizarre: Boris Johnson drives 'Brexit' digger through boxes Britain's Prime Minister and Conservative leader Boris Johnson drives a Union flag-themed JCB, with the words "Get Brexit Done" inside the digger bucket, through a fake wall emblazoned with the word "GRIDLOCK", during a general election campaign event at JCB construction company in Uttoxeter, Britain, December 10, 2019. Ben Stansall/AFP/Pool via REUTERS POOL REUTERS Bizarre: Boris Johnson drives 'Brexit' digger through boxes A sign made for a visit by Prime Minister Boris Johnson to the JCB cab manufacturing centre in Uttoxeter, while on the General Election campaign trail. PA Photo. Picture date: Tuesday December 10, 2019. See PA story POLITICS Election. Photo credit should read: Stefan Rousseau/PA Wire Stefan Rousseau PA Bizarre: Boris Johnson drives 'Brexit' digger through boxes Britain's Prime Minister and Conservative party leader Boris Johnson drives a Union flag-themed JCB, with the words "Get Brexit Done" inside the digger bucket, through a fake wall emblazoned with the word "GRIDLOCK", during a general election campaign event at JCB construction company in Uttoxeter, Staffordshire, on December 10, 2019. - Britain will go to the polls on December 12, 2019 to vote in a pre-Christmas general election. (Photo by Ben STANSALL / POOL / AFP) (Photo by BEN STANSALL/POOL/AFP via Getty Images) BEN STANSALL AFP via Getty Bizarre: Boris Johnson drives 'Brexit' digger through boxes Britain's Prime Minister and Conservative party leader Boris Johnson reacts as he sits in the cab of a drives a Union flag-themed JCB, after driving through a fake wall emblazoned with the word "GRIDLOCK", during a general election campaign event at JCB construction company in Uttoxeter, Staffordshire, on December 10, 2019. - Britain will go to the polls on December 12, 2019 to vote in a pre-Christmas general election. (Photo by Ben STANSALL / POOL / AFP) (Photo by BEN STANSALL/POOL/AFP via Getty Images) BEN STANSALL AFP via Getty

Labour MEP Rory Palmer added: "[I'm] thinking the Brexit Party briefing for Brexit Party MEPs on what Brexit means might need some work."

The UK will leave the bloc at the end of this month under a withdrawal deal struck by Boris Johnson in the autumn. Once the UK has left, trade negotiations will start to determine the future relationship between the two orders.

A Brexit Party spokesperson said: "In this tweet, Mrs Mummery is rather obviously commenting on the deficiencies of the so-called 'transition period' not of Brexit itself."