Ms. Lacey,
Rather than spending thousands on lawyers and postal services, why not spend hundreds on a CCTV system to record your evidence.
If what you say is true then it should not take long for you to have the required evidence.
The Civil Aviation Authority take all complaints of dangerous and illegal flying seriously. Provided the evidence is available to bak up such reports.
Unfortunately for your case even a brief visit to the Redlands website and a check of their published procedures clearly shows the lengths they go to to minimise disturbance for residents in the vicinity.
One can see that great effort has been made to keep the circuit pattern very tight to the airfield and avoid local "habitation". What you must understand is that by insisting that aircraft remain so close to the airfield, they are in turn forced to use a circuit height of 500ft which is perfectly in keeping with normal aviation practice for such tight circuits.
Finally, I must wonder at this lenghty complain against redlands while nothing is said about lotmead farm. Can we assume then that you have no objection to aviation operations at lotmead farm?
Regards,
DFC