In reply to David_Gledson:
Yes: in my opinion, worth a trip over the Pennines to Prof. Waqar Bhatti for ultrasound and other diagnostic imaging, followed by Mike Hayton (www.mikehayton.com) for hand surgery; both have NHS and private practice in Manchester. Spotted former via his presentation at the BMC seminar on hand injury, and he recommended Mike for the (sagittal band ligament) repair. Waqar is a real enthusiast; he spent the best part of an hour ultrasounding my hand to track-down the injured tissue - a thoroughness you will be very lucky to achieve via the NHS.
Alternatively, ask them for recommendations of people nearer to you. They're both approachable.
Hope that helps.
Gary