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Theresa May was booed as her speech at Pride in London was played to crowds weeks after she struck a deal with the DUP.

Some revellers appeared disgruntled while the Prime Minister’s message was read, thought to be over her deal with the Northern Irish party.

The DUP has been widely critised for its right-wing stance on social issues including gay rights.

In footage from the Pride event, which champions the rights of the LGBT+ community, crowds could be heard booing over the Prime Minister.

Mrs May said in a statement to the thousands who descended on the capital that the UK will continue to “stand up” for the rights of LGBT+ people.

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She said: “[The UK] will continue to stand up for human rights, directly challenging at the highest political levels governments that criminalise homosexuality or practice violence and discrimination against LGBT Plus people".

She added: "And here at home too, we must continue to stand up for true equality and respect for everyone, right across our United Kingdom.

"We must stamp out homophobic bullying in schools, and drive down homophobic and transphobic hate crime."

Her speech was read while she attended the G20 summit.

The Prime Minister signed a deal with the DUP to prop up her minority government after a catastrophic election result for her Conservative party.

Founded on the evangelical principles of the late Ian Paisley's Free Presbyterian church, Northern Ireland's largest political party has often been at odds with the region's LGBT community.

Paisley’s son, Ian Paisley Jr, a vocal member of the party and a leading Brexit campaigner, previously said he is “pretty repulsed by gay and lesbianism.”

More than 26,000 people are estimated to have taken part in the parade which began north of Oxford Circus on Regent Street, watched by a crowd expected to number around one million.