In message ,
DICEGEORGE writes
Do I just key in the existing one into ebay
and buy the cheapest,
or go into town to Halfords,

I've used an online seller and they were fine and cheap - I just can't
remember their name.
But last time I needed a battery quickly, I priced the type and maker
online and then rang the local independent motor factors (whose vans are
always scurrying, delivering to small garages). They price matched and I
picked up the battery within the hour.
--
Bill