Ok,

Had a quick look tonight after work, but the battery terminals are nice and clean and well connected

The issue seems to be intermittant as it hasnt happned since and only happened once before she says.

I am leaning toward it being something to do with the PATS system to be fair - just not sure how best to go about preventing a total failure?

I am planning on taking it to ford to get an ECU update done to the latest version software - cant hurt can it?