There are chestnuts trees in London but most of them produce chestnuts which are thin as wafers – I know for a fact that Chinese people know where the good, plump chestnuts are but it’s a closely guarded secret.
As for hazelnuts, I can dream. For the first time in my life I have found medlars at the Imperial War
Museum Orchard – no hazelnuts or chestnuts there.
All the best, keep up the good work.