Theresa May has been heckled in her final speech as British Prime Minister, with someone yelling "Stop Brexit" as she paid tribute to the country, her team, and her partner, Philip May.

Key points: A heckler interrupted Mrs May's final speech outside 10 Downing Street

A heckler interrupted Mrs May's final speech outside 10 Downing Street The Prime Minister fielded questions from MPs at Westminster for the final time

The Prime Minister fielded questions from MPs at Westminster for the final time She reminded colleagues that politics was about the difference made to normal people

Without blinking, Britain's second female Prime Minister replied, "I think not".

Mrs May's authority as Prime Minister ended in May when she bowed to pressure from within her Conservative Party to resign over her management of the UK's exit from the European Union.

While she survived a confidence vote in December — which under Conservative Party rules entitled her to be free from a leadership challenge for 12 months — the parliamentary defeat of her proposed Brexit deal thrice and a string of ministerial resignations eroded her authority.

Mrs May finished her speech by saying that a successful exit from the European Union could prompt national renewal.

"[It] can move us beyond the current impasse, and into the bright future that British people deserve."

Theresa May leaving Downing Street as Prime Minister for the last time. ( Reuters: Hannah McKay )

May's parting words for rival

Appearing in the House of Commons as Prime Minister for the final time before being replaced by Boris Johnson, Mrs May was asked how she felt about "handing over to a man who among many things is happy to demonise [Muslim people], prepared to chuck our loyal public servants and diplomats under a bus and promises to sell the country out to Donald Trump and his friends".

As jeers sounded, Mrs May said she was pleased to hand over to "an incoming prime minister who I worked with when he was in my Cabinet and who is committed as a Conservative and who stood on that manifesto in 2017 to deliver on a vote in 2016 and delivering a bright future for this country".

Labour leader Jeremy Corbyn took the opportunity to pay tribute to Mrs May's sense of "public duty and public service" during the session, which he said "should always be recognised".

Philip May (right) watched on as Theresa May participated in her final question time as Prime Minister. ( Reuters: Hannah Mckay )

The Opposition Leader went on to say he hoped Mrs May would have a "more relaxing time on the backbench and perhaps … even help me to oppose the reckless plans of her successor".

"I'm glad the Conservative Party is in such good heart today, because tomorrow they will not be here," Mr Corbyn added.

Mrs May rejected Mr Corbyn's comments about the alleged health of the Conservative Party, in a parting shot to her parliamentary colleague across the bench.

"Perhaps I could just finish my exchange with him by saying this: as a party leader who has accepted when her time was up, perhaps the time is now for him to do the same," Mrs May said.

This prompted huge cheers from her Conservative MPs and shouts of "more".

Mrs May told Jeremy Corbyn to recognise that his time as Labour leader was up. ( AP via House of Commons/PA )

ABC/Reuters