Ok, I have just spoken to the refunds dept, and they have confirmed that Y and C fares are indeed fully flexible in that you obtain a full refund - no admin fee taken, except the credit card fee of £4.95 if that was charged on non-mbna cards used.

They also confirmed that on award cancellations, £25 is charged per ticket in the booking and not per booking, as DC incorrectly advised me previously.

Hope this clarifies the point.