Off the top of my head, no idea, it was years ago that we bought it, might have even been the old Halfords logo. But bearing in mind that normal car batteries can break the £100 mark at Halfords, I'd expect a leisure battery to carry a hefty premium.
EDIT: The website seems to suggest £89.99 for a 70Ah battery, and £139.99 for a 110Ah. That's with the current offer of £20 off.