Well I think the airport is at least partly to blame simply because, for whatever reason, ACL, when coordinating it, has allowed too many movements during certain hours. I remember when Gatwick was coordinated to max 36 movements per hour and it slowly crept up to the point where 40 movements was being permitted for a couple of hours. I don’t know the figures now (but I’m sure someone will tell me) but it’s certainly more than that. Add to this a fair degree of unrealistic scheduling from EZY and you get the current problems.
Dannyboy39 - if you want to improve punctuality you are better to pad the block time rather than the turnaround. It’s no good if you have a nice, leisurely turnround, push on time and then sit at the end of the runway for 40 minutes. Much better to go for a reasonably quick turnround and then allow for the runway delays in the scheduled block time. As may be obvious, I was involved in scheduling flights from/to LGW for a fair bit of my career.