Maybe it's feeding the leak that put you on the bump stops in the first place
No leaks. Hadn't dropped a mm this morning.
I do wonder how hot that seal can get though when the pump runs in this weather. I could possibly tig some coolant pipes round the aluminium pump liner and maybe use the windscreen washer reservoir with a little punp to trickle fluid round but that seems over the top for something that would probably make no difference!