Zanussi Oven trips

[garrymum]

Think our Zanussi is playing up, model number ZBF 860 X. On two occasions
now it has tripped and gone off (tripped itself, not a breaker on the CU).
After a couple of minutes it comes back on.

I am guessing the thermostat is at fault and the oven is getting too hot,
then the thermal trip is kicking in.

Has anyone else experienced a similar problem? Can anyone recommend a good
supplier of parts?

TIA