Max, well done for not sitting around but getting up and doing something
Frank pointed me to your thread, unfortunatley I no longer have an aircraft and we have a Firework display booked on the day.
I have run a similar event for the Burned Children's Club for a few years now and I would strongly suggest you notify the CAA of your intentions so that there is no danger of any misinterpretation
I am just working on the pilots brief for this years event, 25th August and you are welcome to contact me 01480 387982 if you require any information, want to hear about the experiances we have had or wish to use our brief for information
Have fun and good luck!
Jim