The Chess Classic is the main event in London, but it's only one part of a larger chess festival. There's also the British Knockout Championship (it's up to the final match between Nigel Short and David Howell, tied after three consecutive draws) and an Open event too. One of the players in the latter is an Indian named Praggnanandhaa Rameshbabu*. Oh, and he's 11 years old, having become the youngest IM in chess history earlier this year, when he was still just 10 years of age. He lost an ending he should have drawn to a GM in round 4, and then today overpressed and lost to an FM, so his chances of achieving a GM in this event are almost certainly gone. Nevertheless, he has excellent chances of breaking Sergey Karjakin's record for the youngest GM in history, as he still has more than a year to do it.
For further reading: his Wikipedia page is a good place to start, and the links therein - especially Leonard Barden's article - are worth your time as well.
* And some people think typing "Nepomniachtchi" is annoying, or even "Monokroussos". Never assume things can't get worse, or at least more challenging!