Beko DVC61 tripping electrics?

Hi, My Beko DVC61 fan assisted oven is tripping the electrics and a burning/hot smell is coming out of the back (not me burning food, and no smoke). After some research, we've replaced the element but the problem hasn't gone.

The tripping seems to occur when I use the hob or grill at the same time as the fan assisted oven. The grill and hob are working fine.

The cooker is 10 years old, is it worth trying to fix, or do we call it a day??

Any suggestions gratefully received!!