In reply to Mick Ryan - UKClimbing.com:
Interesting, that to comply with the law, a successful BASE Solo would not be possible, as the 'chute is worn for back-up, a successful solo would require that the jump is voluntary, thus breaking national park laws.
Unless of course the climber claimed, having successfully solo'd that they were about to downclimb and slipped, necessitating the use of the 'chute.