This is common to be honest with this route. It's the fact many people do long haul and transfer on. Plus, the limits aren't as strict as the likes of FR and U2.

I had a G-LCYG to MAD and she was fantastic! Shame my Iberia flight was 4 hours late. We boarded, had engines running for 40 minutes and were told to take our stuff and leave the aircraft as quickly as possible.