Seem to have really improved their signal lately. Very strong around Central and South London.

Station when it's on has been stronger a while now

It's one hell of an improvement compared to how it was the last time I was in London.

good strong pumping out a nice signal in Fulham

From what I understand they had been using low TX sites and only covering their local area until recently, but going by the signal now I would say it must be coming from a much higher site and probably a bit closer to Central London than it was...