fitted the new bosch silver battery today, it reads 13.2 when stood not running and 14.2 at idle now
the old one even when disconnected only read 12.2...
the in car volt meter reads a whole volt higher at tickover aswell now - perhaps the halfords one had had its day...
i have to say it does whip it over much much faster and without any backfires either
wil wait and se 2morrow, fingers crossed