From the Directory of Newcastle:
In 2006 Andrew Rosindell, Conservative MP for Romford, proposed in the House of Commons that St George's Day should be a public holiday and a campaign is afoot to give Saint George's Day the recognition it deserves. Recently the London Mayor, Boris Johnson, gave his backing to the movement which he said had been ignored in London for far too long.
That's from a post that went live this morning. It is a small demonstration of how successfully Mayor Johnson has created the myth that St George's Day went unmarked by Ken Livingstone. As Mayorwatch reported at the time, Boris's predecessor had in fact been funding St George's Day celebrations since 2004 (a point completely lost on a string of half-wits who left Good Old Boris comments).
Helen at Boris Watch elaborated, providing links to coverage of St George's Day events in London in successive years that Livingstone funded and attended. Those links were to GLA documents and photos for the years in question. Alas, since the redesign of the website, these links no longer connect to their original destinations. I've managed to find a press release for Livingstone's 2005 celebrations but I haven't time to track down the rest. I hope they are still there.