Just read the thread and coming in a little late. Sorry to hear about your tank troubles. Are fish antibiotics not available over-the-counter in the UK?
Otherwise, I like your little crypt forest, and your angelfish were an excellent find with those striped patterns.
Pearl gourami's are my favorite, GBR's a close second. I've always been worried about keeping them together because of aggression though. Perhaps the gourami got in a fight, got an injury, then got an infection?