So I picked up the ‘O’ rings and some premixed Motul coolant from the dealer today and after lunch, drained down and disconnected the leaking hose. The ‘O’ ring was fine once I’d cleaned it up a bit and likewise the hose. I replaced it anyway, but I really couldn’t see anything wrong with the old one.

Ah well!

Refilled the system, ran it up, checked the level again, loosened the bleed valve but no fluid came out of the top one and I didn’t bother with the bottom one for now.

I’ll take it for a proper run tomorrow and see what’s what, weather permitting.