Thought it was about time I checked the fluids. Oil is fine, water needed about a pint, which isn’t bad after a month.
Checking the oil I noticed a small pool of bright yellow/green coolant sitting at the bottom of the block near the sump/bellhousing joints. I wiped it clean and started the engine. A brief trickle ran down the side of the block and then stopped as the engine warmed up. I suspect a leaking core plug that re-seals when it heats up. It’s hard to see it because of the exhaust manifold.
Bike tomorrow if it’s dry. Have a look at the weekend.