Personally I feel those charge are perfectly reasonable. Apart from the handling fee. Lets face it no us want it. They certainly offer nothing of any value.
I really can't see what the hang up is with using the local flying school. They offer everything I need.
East midlands have just banned GA from using the flying school. The price has gone up 80 quid. The service (I suspect not been since) is now utterly relevant and I don't think they even care.
This banning of using the local flying school and handling due security reasons is a disease that I really don't think benefits anyone.