Rapid clicking and won't start (Swan SW2022W)

Hi. I went to turn on my washing machine this morning and it tripped the electrics with a bang. I returned the trip switch and tried again.

This is what's now happening:

https://youtu.be/ZCni6w2WVGE

As soon as I turn the programme dial to begin (which typically acts as 'power on' but doesn't start the wash cycle itself), a loud repeated clicking happens (as in, 4 clicks a second) and the lights across the whole top section of buttons all flicker. When I return the programme dial to the off position, the clicking stops a second later.

What I've tried, to no avail:

Checked the drum, seal and filter for debris.

Inserted a new fuse in the plug.

Plugged the machine into a different wall outlet.

Had an electrician in to confirm the kitchen electrics and sockets are ok.

I don't have a continuity test meter to trace faults. Reading the information on this site, something is telling me it could be related to the door lock - I think because the clicking sound is similar to the one I normally hear when the door unlocks after a wash - it's just that right now there are a continuous stream of clicks. As far as I'm able to check this, I can't see any obstruction.

Has anyone experienced anything similar?

The machine is a Swan SW2022W and it was in the house when I moved in 6 months ago. I use it once a week, if that. It will be out of warranty now but I believe it is about 3 years old. Any help would be appreciated, thanks.