My son has a cello case in which the lining is coming away. The local instrument repairers are very good, but recommended Copydex, which isn't really working. The area coming away is quite large, and the edges clearly are supposed to be trapped under the band that goes around the edge of the case. Removing and refitting that could be a job.
Any suggestions of repairers? Within striking distance of North Herts would be good - Bedford, Cambridge, North London etc.