British Citizen entering the UK with EU country passport

[GGtrek]

My son (minor child) will be visiting the UK for a short (one week) school trip in October. His British passport expired 2 years ago and I have not renewed it since he rarely visits the UK (last visit was 2019), can he enter the UK with a EU country passport (he has double citizenship) or is UK Border control going to cause problems on entry if they discover that he is a British Citizen? Should he take his expired British Passport with him?
Thank you

I tried to look for answers online and I only found this on Reddit:
https://www.reddit.com/r/ukvisa/comment ... im_a_dual/

I even contacted FCDO, but apart from suggesting to request a new passport they referred me to UK Visas and Immigration which can only be contacted by paying money

[Ticktack]

My son (minor child) will be visiting the UK for a short (one week) school trip in October. His British passport expired 2 years ago and I have not renewed it since he rarely visits the UK (last visit was 2019), can he enter the UK with a EU country passport (he has double citizenship) or is UK Border control going to cause problems on entry if they discover that he is a British Citizen? Should he take his expired British Passport with him?
Thank you

I tried to look for answers online and I only found this on Reddit:
https://www.reddit.com/r/ukvisa/comment ... im_a_dual/

I even contacted FCDO, but apart from suggesting to request a new passport they referred me to UK Visas and Immigration which can only be contacted by paying money

Your son can enter the UK with his EU passport. He should have no problems at all. To give you rest of mind, he can equally hold on to his expired British P.
A British Citizen doesn't even need a passport to enter the UK. Proving citizenship is where the problem might be.
So the EU passport allows him to travel to the UK and enter the UK but the Expired British passport "if" required shows he has right of abode.

[GGtrek]

My son (minor child) will be visiting the UK for a short (one week) school trip in October. His British passport expired 2 years ago and I have not renewed it since he rarely visits the UK (last visit was 2019), can he enter the UK with a EU country passport (he has double citizenship) or is UK Border control going to cause problems on entry if they discover that he is a British Citizen? Should he take his expired British Passport with him?
Thank you

I tried to look for answers online and I only found this on Reddit:
https://www.reddit.com/r/ukvisa/comment ... im_a_dual/

I even contacted FCDO, but apart from suggesting to request a new passport they referred me to UK Visas and Immigration which can only be contacted by paying money

Your son can enter the UK with his EU passport. He should have no problems at all. To give you rest of mind, he can equally hold on to his expired British P.
A British Citizen doesn't even need a passport to enter the UK. Proving citizenship is where the problem might be.
So the EU passport allows him to travel to the UK and enter the UK but the Expired British passport "if" required shows he has right of abode.

Much appreciated, thank you.