Can I fix my Homark electric fan oven which suddenly stopped working?

My Homark electric fan oven is at least 9 years old and suddenly stopped working the other day - this was unfortunate as I had something ready to cook in it...

I had not turned anything off at the wall, nothing unusual had happened, it just was completely dead when I tried to turn it on. (The gas hob is separate and fine).

I've checked the trip switch (had not tripped) and fuses (new fuses made no difference).

Any suggestions?

There is no model name/number visible on the oven and I don't have a user manual.

thanks