Help please

My Nan used to play the banjo ( many many moons ago ) she was known as “Ena and her banjo”.

Unfortunately her banjo has fallen into disrepair over the years . However her musical genius (apparently a blooming brilliant singer too)has skipped the last 3 generations .We are looking for a recommendation for someone/company to do a sympathetic repair as a surprise for our mums 80th birthday next year .We live in Leicestershire (England) can any one advise us please 

Many thanks