These panasonic 3400mah (button top protected), cheap with the code in the link and shipping is getting through fine. No point paying rip off Britain prices if you don’t have to.
What are you planning to charge them with though?
Also NEVER buy any lithium rechargeable batteries off of ebay unless it is a verified source, at best they will have fake ratings at worst they will be fake batteries and at the very worst they will be a genuine fire hazard.