Wow, sorted, thanks!

I had TCL Off light coming on when crawling in traffic. After a few stop-starts, the engine warning light would come on.

Thought I was heading for a new perssure valve or summat.

Found a few posts on it - ie this from Kieran
which said to find the grey pump on the bulkhead in front of the passenger, and push the two black pipes to make sure there's no leak...

sorted.

thanks!

Will