hah no, that's just a cheap piss in the wind kind of get it done ASAP kind of job that would / could work just fine (at least for the time being).
There used to be a how-to do a rear foglight somewhere on this forum way back when, but I can guarantee the pictures are long gone, and met a guy down in Florida many years ago that did it to his speed3 and had it wired to his foglight switch on the column.
My way would work; it would just require running a new power line to the light though, ground to wherever close, along with a switch and the add a circuit. Basic enough as far as wiring goes.
I'm struggling to find what I was thinking, ran into this guy on here though:
Irregardless, the right way is the right way which would be the only way you technically should do it, since I'm pretty positive their laws are quite strict on things like that (compared to the US that is).
Have to hunt for any local junkyards to see if they have any (I'm sure they do), and disconnect that light from the reverse switch, and run new wires to the fog lights; maybe even source new power from a fuse box.
Point being, there is a cheap and easy temporary solution, and a right way.
If you don't have the time or tools at the moment to do it, I'd just try to get the fog lamp from a local junkyard, find a car shop and see if they can come up with a solution for not too high cost.
No foglight = no MOT right?