Just because this device is available in the UK does not mean the configurations are identical.
I have read numerous articles about differences in the radio frequencies and/or channels used for Wi-Fi in US, UK and other countries. Using unauthorized/unlicensed radio frequencies could cause problems for neighbors, emergency services, and might not even work for me.
The MT1300 user interface doesn’t seem to include any option for changing country or location, so maybe it’s not possible. But, I really hope someone else has information about this.