So most websites will use a geoip database to work this out, most likely from maxmind.com as they are the predominant provider of this.
https://www.maxmind.com/en/home
I've checked your IP on there and it shows as GB successfully. The IP block most likely was used in Germany before this, hence the issues you are facing. The IP block allocation was created in 2020, and updated in may 2021. It's not clear when the country information was last updated, but it could be that anyone using a database before that will see you as not in the UK. People don't often update these that often as they are normally provided by the operating system so might not get updated for years.
There isn't really anything Hey Broadband can do about this unless they can change your IP to a block that has always been in the UK, but they may not have a pool that they can do this from.
john
Edited by john (Fri 17-Dec-21 14:17:36)