Mikef, I am based in London and am a wholesaler/exporter of wines & spirits. If you want some exceptional rums why not try Bristol Spirit's Classic Rum range. They have got some fantastic old rums - Monymusk 25yo, Port Morant 20yo, Versailles 18yo, Long Pond 16yo etc etc. I know that they are sold in Harrods but they are a bit expensive there. If you are interested I could talk to the owner (who I get on very well with and I can try and find out where he sells cheaper).