Hello Everyone, I am a full British Citizen with a full British Passport and next Christmas of 2020 i will be officially moving back to the UK. I know i will have to register with a GP which won't be a problem since i am diabetic. I know i also need to notify HMRC of moving back to the UK, but because i have been gone for 18 years do i need to get a Police Certificate to be let into the UK or am i okay since i'm not subject to immigration? If anyone knows that would be very helpful as i really don't know the answer to this one. Please also know i have not naturalized nor have i applied for US Naturalization.

Thank you!

As a citizen, you can just walk straight back in

Okay brilliant, Thank you very much!

There’s no need to notify anyone of your return to the UK. The rest of it - GP, electoral register, Council Tax, utility providers, TV licence - is the same as if you were moving house within the UK. There’s nothing special you need to do from a UK perspective as a returning expat. HMRC will become aware of your return once you start interacting with them in the normal fashion.

Consider naturalising as a US citizen in order to leave that door open to any potential future return.

When I relocated, it was pretty simple.
I stayed at the same place i was living at before I left.
And i registered with a GP as normal.
May I ask if you've ever had an NI number? If so, then it would be the same.
I also registered on the electoral roll, got a bank account, and more or less continued from where I left off.

That's good to know.
How long were you out of the country out of interest ?
When you say you moved back to where you were before do you mean the same town? Or back to family?

I ask these things as the OP has been away from the UK for 18 years. I've been out of the UK for 16 years.

A UK return becomes no simple matter as there are many factors to take into consideration.

Think about National Insurnance. No obligation to pay for the years you were away but you may wish to do as many as possible to top up your contribution record.

Hi there, Yes i do actually have a NI number, Took ages to find it but yes absolutely i do have a NI number

Totally agree

Contact National Insurance in Longbenton and ask if you can pay any missing years.

So as to avoid confusion for the OP, that's Longbenton.

I made a tyops. Now etided.

Very good.

You are not required a Police Clearance certificate to enter the UK. You can continue to register yourself with the GP and the HMRC as per your requirements.