Cannon Chesterfield Trad 60 Standard lpg gas cooker?

Grill works fine.

When using the top oven it shuts off after being burning for app 15 mins.Will light again on the pizzo igniter buts shuts off again immediatley on releasing the depresed knob. wont relight an run again until an hour or more has passed. Thought it might be the thermocouple and got Cannon to send me replacement part no c00255846 not sure if they have sent me the correct part as it is marked Aristo,Indesit,Hotpoint and Scholte's ? will this sort the problem out Please Help if You can,many thanks Jim Waters.