- 6 updates
The Labour Party has published a video message from leader Ed Miliband in support of the London Pride parade.
"It promised to be a very, very important year if we can get the same-sex marriage bill passed," said Miliband.
"I'm proud to support that bill because I believe that the gender of the person you love shouldn't determine whether you can marry them."
London Mayor Boris Johnson has provided London LGBT and Community Pride with a grant worth up to £500,000 to stage this year's Pride in London and develop it over five years.
"As befits a city with a large LGBT population, London hosts one of the biggest events of the year and I am delighted to support the festivities, which attract people from across the UK and beyond."
"As the parade shows, it is a diverse and multi-faceted community, which makes an enormous contribution to our city's success, socially, culturally and economically.
"We should be very proud of London's reputation as a place where LGBT people can be open about who they are," he added.
The leaders of the three main political parties have stressed the importance of equal marriage reforms, ahead of the 2013 Pride in London parade.
Labour leader Ed Miliband warned there is "still more to be done" to change attitudes.
Largecrowds are expected in central London today to support the cause of same-sexmarriage.
Organisersfrom the gay and lesbian community hope it will be the biggest same-sex rally everheld in the UK.
9,000 people are expected to turn out.
150 gay and lesbian support groups from all over the UK will be parading through central London.
The parade route runs from Baker Street, along Oxford Street and Regent Street and ending at Trafalgar Square.
Equal marriage reforms will allow gay schoolchildren to "stand a little bit taller", David Cameron said as he heralded the 2013 Pride in London parade.
The Prime Minister told how he hopes youngsters would be able to see that Parliament "believes their love is the same as anyone else's love" as thousands of people prepare to descend on the capital today for the annual gathering.
Organisers expect the parade and festival to be the biggest lesbian, gay, bisexual and transgender event in London over the last decade.