TAG Link Automatic needs a service?

My Tag Link Automatic is loosing about 5 mins every month, so im thinking its time to send it off for a service, my question is;

Does anyone have a recommendation for a trusted company service in UK or does it go to TAG service department? I live near Chester in North West and no one is coming up on Google searches..

Hi Dave. How old is the watch? If it's a newer one, I would lean towards TAG Heuer but for an older model I'd probably look around

Ok thanks for that... What is old? LOL me in the mornings ....

The watch is about 2007, unfortunately TAG service department are saying 40 days turnaround for £290! (memo to oneself upload picture to profile)

Ive had another quote from Swiss Serve, London.
+44(0)1262-671364
Local 0845-2575-828
They are quoting £180 with 14 turn around but its a trust thing... hoping someone else has had dealings with them..