https://nas-row.com/index.php?threads/torque.946/ This might help, second post mentions the MOD requirements.

Like drawing blood from a stone, your replies, try and give as much information as you can regarding your vehicle to allow other's to help you.

I think for Historic / Mot free status there must be no significant changes in the past thirty years, if the engine conversion was done thirty years or more ago you should be ok.

One of these.

My 2003 Td5 has never had one, if I were you I would take it off and not worry about it.

Sorry to say but that chassis looks fubar'd. Take it back to where you bought it from and mention Trading Standards etc.

Forget what I said, miktdish has the answer, mine was a brain fart moment.

On a bracket bolted to the bulkhead above the brake pedal, when you push on the brake pedal the plunger is released making a circuit and the brake lights come on. If the switch faulty your brake warning light can come on.

Check the brake light switch, the plunger may be stuck.

Would they fit a Td5 ?

If they are really bogged down you could pull off their front bumper, exhaust, brake lines any wires underneath etc.

If you do decide to tow someone out of the mud, make it very clear to them ( video it on your phone ) that any damage to their vehicle is their responsibility. You could possibly pull something off their vehicle.

If these don't work out for you I will scan them tomorrow 👍

There are 4 diagrams for the t box, you want them ?

Could it be part 14, No 571536 ?

Here's a link for Airportable seatbox parts. https://yrmit.co.uk/product/lhs-seat-box-end-series-lw/