I have dual US and UK citizenships and I am thinking of returning to the UK as a retiree with my US born spouse. I have been away from the UK for more than 50 years and I have no NI number. We have pensions and social security plus some investment income in the US that can be sent to a UK bank account. I have never paid any tax in the UK so I am unsure if we can get an NI number. Can we get one without looking like a freeloader for using the NHS?