Engine cut out, what could that be?

[Caxap]

Strange this one.

Was driving to work then all of a sudden car juddered and stopped engine. Tried to restart it , but it kind of whined instead of ticking over. No warning signals shown on a dashboard.

Once rescue man arrived , he scanned it etc and said no faults were detected. All electrics , injector, pump are fine and working. He suspected that cambelt jumped few teeth etc.

Cambelt was changed 2 years ago at vw dealership and car travelled 9000miles since then, so not sure.

Atm friend of mine will come round to do a proper scan on his fancy Delphi machine to see for any clues.

What you reckon, what that can be? And if that's cambelt where do I stand against vw dealership?
Prior to that, car didn't give out any symptoms like juddering or smoking, it was perfect.

Car is 58plated 2.0cr tdi Cbab.