It came to a grand total of £1200 (inc VAT), but that was including the £400 gearbox job mate. Was done by Mansfield Engine Centre, and to be honest I can't fault them at all. I'm not 100% sure (I know, I should've asked) but I think they did some kind of actuator too (not on the invoice mind you).
If you don't fancy, or can't do the job yourself, I would recommend them. I asked around and a few people I've spoken to recommended them and they saved my sister a fortune on a head-gasket job a while back.