mine also came from Kempton, quite a cheap example as had a faulty cocking arm, Turned out to be the spring and after getting the measurements and some suitable spring wire made a new one, shoots very well, not huge power and a real bugger to cock, feels great in the hand.
Steyr LP10, Steyr LP5,
Vintage Collection - Walther LP53, HW77k Venom, BSF S20 Match, Original 35, ASI Target plus lots more