Does anyone want to help make a quick website that could answer this eternal question, and perhaps spread a bit of environmental advice as it goes?
Along the lines of isitChristmas, but obviously localised by Post Code, the site would offer RSS and iCal feeds of whether it’s bin day for you — with reminders the day before, and telling you what week it is for recycling purposes (green or paper/plastic) for those that have differences. Along with this simple, but useful service it could impart environmental advice and info slipped into the RSS as well as somewhere on the site. It could even do calculations of stuff like “my council doesn’t collect X, is it better to just bin or drive it to the recycling centre?”.
It could get a few ads from electricity suppliers etc to pay its way perhaps.