The Paralympic torch is being carried through the capital towards the Olympic Park, where it will ignite the start of the Games on Wednesday evening.
The relay arrived in London via the Shri Swaminaryan Mandir temple in Brent, carried by torchbearer Anthony Eames.
It will be gracing the six host boroughs, visiting other landmarks including the Abbey Road crossing, Lord's Cricket Ground and London Zoo.
Four individual flames representing the four home nations were carried into the stadium at Stoke Mandeville on Tuesday - the spiritual home of the Paralympic Games - and one combined torch was carried out, a beacon of the Paralympic spirit.
Stoke Mandeville co-hosted the Games with New York in 1984, when they took over the running of the wheelchair events when Illinois pulled out at the last minute, but 2012 marks the first time the whole Paralympics has been staged in the UK.