250ml for £1 is not bad but it's £1.64 for 500ml at Boots which is better value.

How many mls?

250ml bottles, some of the less common ones come in this size like 24h hydrate and dermo deep clean

this is the shower gel, which is typically more expensive than bath foam, good price for shower gel,
the bath foam v good at £1,56, usually 2 for £4 at cheapest