Tax Reporting for UK Resident with Foreign Employment Income

I've recently moved to the UK but am still employed by a foreign company. My employer has a UK branch but maintains that I'm under foreign employment and won't assist with UK tax reporting. As a new UK resident with foreign-sourced employment income, how should I report and pay taxes in the UK? Do I need to register for Self Assessment, and are there any specific forms or procedures I should follow given my circumstances?

Hi acp paul peter,
Yes, you would need to register for Self Assessment and complete a Self Assessment tax return at the tax year end.
Please see guidance here:
Check how to register for Self Assessment
Thank you.