Brittania oven won't turn on or heat up - Already replaced thermostat

Hi,

I've got a (UK, 240v) Brittania electric oven which no longer wants to heat up. The main fan element was replaced by myself a couple of years ago. I've just replaced the thermostat (no difference).

Turning the oven on (to either fan, top grill bottom grill or oven without fan) results in neither the oven indicator light coming on, nor the thermostat light (oven warming up) light coming on. The main cooling fan comes on though.

I've checked with a multimeter for resistance within the heating elements, they all came back under 100 ohm (I think I did it right, saw a video on youtube!).

From what I can gather that only leaves the main oven switch left to test? Anyone got any pointers?

Thanks