Iom Bhx
One of the main reasons for the delays on this route of late is mainly down to the work that is going on in the IOM, and the creation of a starter strip and taxiway to the 08 end.
Due to the work, and the machinery around the runway, the landing distance can be shortened. Plus, with the wet weather we have had also, it causes many problems with the EMB145 used on the route when the runway is wet.
When the EMB145 can't land here, Flybe will try and put a Q400 on the route, and they usually arent available until a few hours later.
Hope this helps