Bought another Optima Yellow this morning plus two new starter batteries from BatteryMegastore. They have a voucher for 5% as well if you can find it via Google. I have used them before and their next day free delivery was spot on. A big yellow for under £200 delivered is pretty good. I have been very pleased with mine so far. It DOES need the correct charging regime which it gets from my CTEK DC -DC set up. If you are looking for a leisure battery this is a good one at a decent price. There are several yellows, this is the largest and it fits nicely against the rear wheel tub due to its off set design
http://www.batterymegastore.co.uk/product/YTS+5.5/?ref=bmuk&gclid=CKWs94PYgMACFSHItAod5y0AVQ
http://www.batterymegastore.co.uk/product/YTS+5.5/?ref=bmuk&gclid=CKWs94PYgMACFSHItAod5y0AVQ