I cannot find anything on the Eribfolk website regarding the new towing regulations, it may be worth mentioning that you no longer need to take another towing test if you have a license issued after 1 January 1997. I think it is to free up testers to concentrate on HGV drivers.

https://www.gov.uk/guidance/new-rules-fo...rom-autumn-2021

What changed on 16 December 2021
If you passed your car driving test from 1 January 1997, you’re now allowed to tow trailers up to 3,500kg MAM.

Check your car’s handbook to find out its gross train weight (GTW). This is the total allowable weight of the car plus the trailer plus the load.

DVLA will update your driving licence record to show that you’re allowed to tow trailers. You’ll get category BE added to your driving licence when you get a new photocard driving licence.