Good ol' Pete Grassby: he repaired my first button accordion overnight: don't know how much midnight oil that took!
But he doesn't have a "hall" Lynne: he sets up in any otherwise vacant shop, so you maay have to search him out. One year he was down fairly near the sea front, another year up opposite the old fire station. Worth the search, though: last year he was handing out ice-creams to anyone who would take 'em!
TB