UK Citizen, employed in Ireland - looking to work remotely from UK

Am a UK national, been residing and employed in Ireland for past 20 year. Looking to move to UK but continue employment remotely with current Irish employer. How would this work from a tax perspective pls?

Hi,
You would need to register for self assessment, as you will be in receipt of foreign employment income, which you would declare in the tax return.  
You should also request a certificate of residence (https://www.gov.uk/guidance/get-a-certificate-of-residence) to send to the tax authorities in Ireland.  This will allow them to tell your employer not to deduct income tax in Ireland.  
You should also contact the national insurance enquiry helpline for advice on national insurance.  
Their  number is 0300 200 3500.
Thank you.