Compare terminal type. There are four distinct terminal types all of which have very different properties so it is very simple to find out which you require. The standard UK type (picture 1) are easily recognised as they are extremely common. Measurements (at the base of the tapered terminal) are 17.5mm for the negative post and 19.5mm for the positive terminal. Japanese terminals (picture 2) are visibly narrower at 13.1mm for negative post and 14.7mm for the positive. Lug terminals (picture 3) are square bolt-through terminals usually fitted to pre-1996 Ford vehicles.
Something I had not realised was that the UK terminals have different sizes for posite and negative which is something to take into consideration when changing polarity.