It was difficult to confirm because the engine would run a long time before cutting out. But yes, I think that is the one.

ECU off to Actronics I think.

(I could have bodged it, but there are safety issues and, in any case, the failure of the switched earth suggests that the ecu is failing and that it might only be a matter of time before one of the other common issues rears its head)

Thank you

Paul