As others have said, if sitting together was so important to them why didn't they sort that out as GCHs. Glad OP sat in his seat as if there is one thing that gets my goat is when people are demanding and pushy without any sort of justification. Mind you I would have told them it cost me £200 to reserve my seat and if they can cough up the cash there and then, I'd happily move otherwise, divider up and good night...muppets!