Claims resulting from a widely publicised mid air crash between two light aircraft over a busy motor way junction are expected to reach the High Court later this year.
In one case - Brewin v Redhill Flying Club Ltd and another - the dependant of the pilot of one of the planes is accusing the flying club of negligence.
The dead man was one of four who died when the Piper Archer he was flying was in volved in a collision with a Tiger Moth.
At the time of the crash the pilot of the Archer, who held a private pilot's licence (PPL), was on a training flight under instruction by one of the club's instructors, who was also killed. He was training for an Instrument Meteorological Conditions rating for his licence.
Such a rating entitles pilots to fly in weather which the holder of a normal PPL is not entitled to fly in.
The accident, which occurred in May 1990, happened over the junction of the M25 and M23.
All occupants of both planes were killed, but miraculously there was no injury to anyone on the ground below.
The debris from the crash fell onto either side of the motorways.
Solicitors for the plaintiff are John Pickering & Partners in Oldham and for the Redhill Flying Club, City firm Cameron Markby Hewitt.