Stephen,
You are correct, your DVB-HD module will not work in the UK and never will.
You will need to get it replaced with a DVB-HD T2 when available.
The background to this situation you find yourself in is:-
The most used standard for DVB (Digital Terrestrial Television) in Europe, including the UK, is DVB-T and some countries have decided to introduce High Definition signals using the same system.
However, the UK government decided sometime ago to approve a new system to broadcast High Definition signals called DVB-T2. This system uses less bandwidth and significantly higher error correction methods rather than reduce the number of TV channels available
The UK is/was the first country to use DVB-T2.
Whilst this UK decision has been known for at least 2 years, perhaps longer, B&O were slow to understand the potential issues for their customers like you and continued to sell DVB-HD modules factory fitted to the Beovision.