Finally phoned up and have got my car booked in to Beadles Medway on the 14th.
Been a bit worried and had a few concerns, but the girl on the phone gave me the details of the service manager, so I sent him an email asking about including servicing, clutch, spark plugs, etc, as well as informing him about my modifications. I also thought I'd be blunt and ask about how many recalls they'd done due to the issues other owners have been having. He phoned me back within 30 minutes and we've just had a chat about it. They've done between 10-20 recalls he said, and so far, only a couple of cars have come back for minor oil leaks and such - no catastrophic failures for any cars they've worked on. Which has put my mind at ease a bit.
Should be getting a full service and new spark plugs at the same time. I've enquired about a clutch, but I am going to let him know, as I'm considering whether it's worth going for an aftermarket replacement. I don't plan of adding any more power, but I've been told putting in an Exedy clutch would be a good upgrade. Any opinions would be welcome - I don't want to do anything that will feel any different.