Depends what you mean by "British Beer Revival", basically. Long story short, there have basically been two British Beer Revivals:
i) since the 70's, revival of interest in cask ale, brewing traditional styles of beer on a small scale with attention to detail then and keeping them well, based pretty much straight up on the existing british brewing tradition and
ii) since the late 90's / early 00's, revivai (or possibly just vival) of interest in varied / innovative / experimental / outright weird beers, strongly influenced by the American craft beer scene.
Although there's a lot of blurring between the two.
FWIW tonight I've had great examples of both - Harveys Sussex Best representing a really well brewed mid brown session bitter, and stuff like Magic Rock's Dark Arts, Moor's Dark Alliance and Oakham's Hare and Hedgehog at the less traditional end of things...