Hi Andy, I know how you feel. I do the same with my DBS. Having a pro work on it just puts your mind at rest and Labella strings will exert more tension on the neck than the new Rotos on there (make sure you don’t ditch those strings, I only put them on last week for an hour!).
I asked a friend and he recommended these guys in Stokes Croft:
http://www.edgeguitarservices.co.uk/
I actually need to take a guitar to get looked at by SiCo sometime (I need the pickup rewound and I’ve heard they do a good job) so if you’re stuck I can drop it in with mine but won’t be until next week sometimes.