Tours Starting and finishing in London?

[soundofwhite07]

hi, im going to london next year in may and wanted to do a europe tour, i love the ones on contiki and topdeck. but none of them actually go back to London...
has anyone done these? and how did you get back, do they end at the airport or something so you can fly back? lol

if not does anyone know any good tour company that actually does round trips.

thanks