Digital Nomad - Where to pay taxes

I am a UK citizen but I haven't lived in the UK for 12 years. So I am not a UK tax resident. I am going to become a digital nomad. I am going to be working online for a US company as I travel. Effectively, I will not have a tax residency. So where do I pay taxes? I'm wondering if I should declare myself as a UK tax resident. But can I do that if I don't live there? If I do, will I be be able to make use of things like ISAs and SIPPs? From reading other threads I expect people to tell me that I should be paying taxes in the countries that I am working from. In reality, this is not possible. It's going to be difficult to get a tax number for a country that I'm only in for a few weeks. What happens if I send money to the UK? I'm guessing remitting funds will make them taxable if tax hasn't been paid on those funds.

Hi,

You will pay tax in the country you consider yourself tax resident and it is up to you to determine which country that is.

Thank you.

Hi Robert Kerr,
You will pay tax in the country you consider yourself tax resident and it is up to you to determine which country that is.
Thank you.