I didn't want you bring false hope, but as Buckman also suggested, I believe the issuing of a UK licence would also follow your local dates of issue, and as such if yours predated 1st Jan 1997, then you would automatically receive BE.
It is also my understanding that as a visitor to the country you could continue to drive any vehicle you were entitled to do so at home, and that would include trailers. But there are limits regarding how long that grace was allowed.
I did make this point earlier about trailer widths. Up until 2010 the Maximum width allowed was 2.3m, but it was raised to 2.55m
On the assumption the above is correct, then provided your home licence allowed you to drive your outfit then you could continue to do so in the UK.
I should also point out that the B+ or BE limitation is presently under review, with the strong likelihood the standard entitlement will be expanded to include the BE provision. However it was due to be introduced on Nov 15th 2021, but it has been delayed. If it is implemented then you don't have a problem. But until it is actually enacted we have to continue to comply with the present limitations.
I cannot confirm all these details are correct, which is why you do need to seek official replies from the relevant authorities, and not rely on the information given on an anonymised forum.