Don't know about b) but a) will probably be Bournemouth Handling and if they are nice they might waive handling charges. For c) give ATC a call on 01202 364150 and book in, you don't need a flight plan.
You could also phone one of the flying schools at EGHH (Bournemouth Flying CLub?) and explain the situation and they might allow you to be "handled" by them, saving the handling fee if it is not waived..