Exceptional service from these guys. Cheap and speedy delivery even though they're from another country (Wales 😁) 

I chose my battery by size but still got it wrong. They picked it back up when they delivered the new one and only charged half the cost as a gesture of good will. 

A very efficient and fast service. 

https://www.tayna.co.uk/

I've used them a couple of times too, cheap and fast!

If you live by a TFM (Telford Farmers Market) they sell batteries. They are about a tenner cheaper than Tayna for an 063

I always wondered what TFM stood for, and now I know 😁  I live near the Bridgnorth one.

I've used Tayna to replace my old sierra battery, the square terminals are getting scarce and they had them on Ebay at a good price with decent warranty. Best bit, there was an additional discount code to use in the Ebay advert. Came within a day or two for less than 40quid.