I can fit a 750km FAI triangle into the Uk and from Parham it's actually
acheivable.

PAR, PRE, BRN, PAR ( Parham Prestign up through the Midlands/manchester
airspace gap to Burn and then home to Parham ( via approximately Newbury to
miss the Heathrow airspace ) The FAI distance is 755km tha actual distance
around the airspaces is about 785.

Not impossible if we get another day like August 15th last year.

Ian