I had a major leak on my radiator which was very efficiently replaced by Adam at MelvynRutter (under warranty) - this seems to have fixed the leaking.

To answer John V6’s question about the engine coolant cap being changed - attached are some photos - the original cap has a red “Stant” printed on it, the new cap has no such printed text. When the cap is replaced the header tank is drained and refilled with 500ml of coolant (and a sticker applied to the side of the tank).

No idea if these two things will permanently fix the radiator blowing again, but I hope they will!

Old cap as installed (note there is a second similar tank and cap, just visible under hood - that is the aircon coolant):
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New cap:
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New cap and sticker installed:
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