Our resident ATCO will know more about this than me , but I believe there is currently from time to time an overload of traffic through Honiley ( which coincidentally appears on your screen as 2 , possibly 3, Ryanair flights) and thus dependent on FL, Heathrow inbound may be routed for descent via Trent/Lesta/Daventry thus avoiding conflict
Hi all.
They may be changing the air corridors from time to time,to cator for the volcanic ash clouds,to try and stop the disruptions or cut down the disruptions as much as posible,and this might be the reason in this case.
regards alan.