Just went on Dell's Support site to check for new driver updates.

I used the "Analyse System for Updates" button as I usually do (last used ok about a week ago)...which initializes the "Dell System Detect" software. However, on this occasion it downloaded a new version of the software. It installed fine but now I get this:-

Your product is not currently supported by the Dell Driver Analyze Utility.

to return to the Drivers & Downloads page.