There is no bleed method.

Engine cold, check fluid level in radiator.

Make sure the hose between the radiator and overflow tank is clear. The fluid level in the tank should vary depending on engine hot or cold.

 

Interestingly, I filled the coolant expansion vessel to the max level (was below the min) and I think that may have sorted the issue. Will monitor for the next couple of days and see what happens. Thanks!!!

Just the other 2 or 3 things to solve now