I was looking to book LHR-CPH flight for 18th March, as BA Gold I expected all seats to be available to choose from, but it turns out rows 7-11 are blocked off. I've booked earlier this week a LCY-EDI flight for New Years Eve and had no issue selecting 2C/2D... does it mean those front row seats are occupied on LHR-CPH route or there's a cut off date when they become available?