Anyone booked for this? Not sure if I should have booked as there is no time scheduled for sightseeing in London, but then it was 11 days and I sort of didn't want a 9 day one.. .. ..long-haul flight from West Coast, so the time should be longer.. ..but sort of breaking the bank.

You could have your flights scheduled so that you arrive in London a few days before the tour starts, which will leave you time to sightsee in London. Or, stay a few days after the tour ends.