Electrolux Fan Oven trips circuit breaker?

My Electrolux fan oven (EOB945GR1) trips the circuit breaker in the consumer unit after it has been used. It only trips when I turn it off, and only when the oven has got pretty hot (over 120 deg celsius).

There is also a constant strange ticking noise coming from the oven! The light has also just blown. The connection to the consumer unit has been checked by a professional and is fine.

Any help appreciated.