why bonfire night is not traditionally celebrated anymore

Well I'd like to say it's because fireworks are very expensive and cause a lot of unnecessary distress to domestic animals and damage to the environment, but as the air outside my backdoor is thick with sulphur and I can hardly hear myself think, this is perhaps not the case.

If you're looking for a really offensive 'traditional' British display, get yourself down to Lewes on the south coast and help to burn an effigy of the prime minister.