UK driving licences issued from 1st January 1997 onwards have always had restrictions on what you could tow - you needed to take a separate towing test to get the "B+E" entitlement (if you passed your test before the end of 1996 you automatically had this). There was a lot of publicity about this requirement being dropped with effect from November 15th, but it was announced yesterday that this has been delayed:
www.gov.uk
The rules about what you can tow will not be changing on 15 November 2021. The change will be introduced at a later date, and as soon as possible. Sign up for email alerts to be told when the new date is confirmed. You must continue to follow the current rules until the law changes.

Towing with a car
Towing trailers, caravans and horseboxes with a car, including the weight and size limits, and what licence you need to have