OK even if I'm a person who knows almost nothing about air fares and yield management, I would try anyway to shop for something else if I'm asked to pay EUR 1100 for 3 tickets LGW-DUB.
I've just made a quick check:
now it is 11am UK time, BA website offering me return ticket LGW-DUB-LGW with TODAY departure to DUB at 16.10 for a GBP 124.70 per person incl taxes and return flight some week later. I bet that BA ticketing desk at LGW would offer me the same fare if I go there now. I think that EUR 570 (GBP 375 instead of EUR 1100) difference for 3 persons is a good reason to spend 3-4 hours more waiting for BA departure rather than to catch first RYR flight.