Damian B - offer noted!
Actually we are keen to use a known team who work together closely for improved safety and speed so there isn't much opportunity to involve others. It can be quite interesting for pax in the target / subject aircraft though.
Anyone in East Anglia wanting to join in with the team (on the photographic rather than the formation flying side) with excellent flying skills and a good photographic eye I am always happy to talk to but not only is there no payment you have to pay your own flying costs - all for the fun of taking pictures and possibly getting them published (again without payment) in an aviation magazine.