Haven't been on here for a while but as I've always struggled to find garages around here I thought it was worth the heads up. I've just had my head gasket, timing belt, water pump and rear damper replaced at a place in Basford. He's a top bloke and very knowledgeable, My expansion tank was starting to look like a jar of Helmans, a friend just had his K series done and recommended him.
I'm a bit precious about handing my car over to non Lotus specialists so printed out quite a few service notes for things like the head bolt tightening proceedure and coolant bleed taps. He was familiar with pretty much everything. Charged me £300 labour (I supplied the parts) and that included a trip to Coolex to get the oil/water rad pressure tested.
I thought that was pretty good. anyway here's his website:
http://www.jaysautocentre.co.uk (I know, not great)