Britain's first plastic banknote featuring Sir Winston Churchill will, like the great stateman's reputation, "stand the test of time", the Governor of the Bank of England has said.

Unveiling the full new design for the £5 at Sir Winston's birthplace, Mark Carney paid tribute to the wartime prime minister's "bulldog spirit" and his part in British history.

He said: "This spirit is just one, only one, of his many contributions that the Bank commemorates with the new fiver."

Mr Carney said "money was memory for a country and its people" and for that reason it was right that historical figures such as Churchill appeared on notes.

The "new fiver", which is being issued in September, marks a break from the current paper notes because it is printed on polymer, a thin flexible plastic film, which is seen as more durable and secure.

It is slightly smaller than the note it is replacing, can be wiped clean, and is tear-resistant.

The note was revealed today at Blenheim Palace in Oxfordshire where Sir Winston was born in 1874.

Mr Carney added: "Our banknotes are testaments to the outstanding achievements of the nation's greatest individuals.

"They are repositories of the United Kingdom's collective memory.

"That contribution will continue with the new £5, which brings together the future, in the form of polymer and the most advanced security features yet, and Britain's glorious history, in the achievements of Sir Winston Leonard Spencer Churchill."

The new design is set to enter circulation in the autumn with a first print-run of 440 million notes, marking the start of the old notes' withdrawal.

Current £5 notes feature prison reformer Elizabeth Fry.

The announcement by the Bank of England in 2013 that Fry was being replaced caused an outcry as it could have meant that, apart from the Queen, there would be no female faces on the UK's notes.

Thousands of people signed a petition in protest at the move, and it was subsequently announced that novelist Jane Austen would be the face of the new £10 note from 2017.

Like the new fiver, the new £10 and £20 notes will also be printed on polymer.

In April, the Bank announced that artist JMW Turner will appear on the next £20 banknote, due to be issued by 2020.

Australia introduced the world's first plastic bank notes in 1988 and more than 30 countries have since followed suit.