They did last Christmas - and this Easter. But it's not a given that they will be doing this regularly. I understand from them that it's a question of whether bookings are slow at these holiday periods . . . bookings are down at the moment so there is hope
Am assuming that 15% is for on line bookings only and not telephone (after all it would be Xmas day). Its just that the holiday we are thinking of taking has got to be booked by phone.