Certainly sounds like a group booking of some kind, but don't get too excited. It could just be a film studio group flying to London and who'll be entirely unrecognisable to most of us!

What's particularly interesting is that there isn't a single occupied seat on the 268 that day. Also there's no more than 5 seats available on the days previously despite being 4 months away - certainly seems a popular F route at that time of year.