EXPAT FAQ
https://www.easyexpat.com/en/faq.htm
What happens if I keep an IRA in the US while living somewhere else
You'll have to look at the tax treaties between the US and whatever country you're in to see how they deal with income from IRAs held in the US.
In the UK, the US income from the IRA will be taxed in the US and you'll get a tax credit for that income in the UK so that you won't have to pay tax on it again (and of course any income you get in the UK will get a tax credit in the US up to 70K USD/year).
It is therefore possible to keep a US IRA in the US, while living and working in UK.