Pride, in the LGBT context, refers to events such as marches, parades, and festivals celebrating the fact that LGBT people are now proclaiming themselves as proud to be lesbian, gay, bisexual or transgender, rather than, as in previous generations, being ashamed or attempting to hide it. A measure of the success of this movement is that festivals in various towns and cities across the UK can now just call themselves "Brighton Pride" and so on, without needing to spell out in the title that they are gay or LGBT events.
The first Gay Pride March in London was on the 1st of July 1972 and was organised by GLF. The date was chosen to be the nearest Saturday to the Stonewall riots of 1969. There had been a small march the previous year, but it had not called itself a Pride march.
Pride festivals have grown across the UK and now take place in about fifty towns and cities each year.