We're in London for a few days and we would like to do a daytrip or tour to this town for photography & exploring. Are there any decent tours out there that spend a decent amount of time here? Or, is there a bus or train from London (we're staying near Kings Cross station). We don't drive. Any help would be appreciated! We do want to spend at least 2 hours here. Is it busy? Probably go here on Easter Sunday, if fates allow! Or ?