Persistent coolant leak. Took it to a great local mechanic. Coolant pump leaking and was replaced. This then led to an issue with the coolant tank leaking (see image). New coolant reservoir. Now it appears that there is coolant leaking by the oil cooler. Hopefully third time the charm. The reservoir was an interesting one. One of the plastic inlets was cracked, possibly someone leant on it and it cracked.

Twin air?

If so it's a common failure on the earlier engine's they brake around the house stubs

Yeah, a twinair. Currently waiting for this work to be done then it's for sale. It's a 7 seater and has been treated well and has a great spec but I'm sick of taking it to the garage!