From experience, the best light bats I've used were Asian made. I think a 2.8 AM bat I used as a match bat before is possibly the best bat I've used below 2.9. It had a crack on the toe, which I repaired and moved on, and the guy using it absolutely loves it. He had previously used an Instinct bat, which wasn't massive, but pinged like heck too.
In terms of bats made in the UK, the best I've seen are the ridiculous ones from Robertsbridge, (A monster 2lb 8.5oz Dyna) and the modest sized ones from Newbery. I'm sure Salix also do good light bats, but most are around the 2.10 mark from what I've seen...
I use a slightly heavier bat though, so someone else here will give a more accurate insight. I wish I had enough balls to go for a Stuart Kranzbuler special! Just fear the custom charges and damaging the bat... Should probably condense the collection by selling a few then taking a chance with one...