Why's that?
Most boats on the south coast charge £400 + for a weekend charter (£35 a head) and you usually get just a drift as the 2nd dive and back in 6hrs. At Dover it's 2 wrecks and back to port awaiting slack for the next one so it can be a 9-10 hr day. I think it's quite reasonable,especially the £15 for the 1 dive this weekend.......others may charge £30 for 1 dive.
Alan