The Wave Music System IV has a power rating of 120V, which is suited for the U.S. However, in the U.K, the power rating requirement is 240V, so it's not recommended to connect directly to a UK socket. In order to use the system, you'll need a transformer to bring the voltage down towards the 120V for your system to operate.
It's not something we can guarantee will always work but there are third-party transformers out there that will do the trick. If you'd like to go into this further with us, please reach out to your local support. To do this, go to Global Contact Page > Select your country > Scroll to the bottom of the page > Click 'Contact Us'.