Tax in Angola through UK office

Currently deciding whether to work out in Angola and would appreciate a little guidance .
I usually work as a contractor as a limited company .... but been advised that position I have been offered can only be taken if I work through their UK office as staff due to their company rules

Rotation 28 / 28
They will take care of my Angolan Tax
Will I then be taxed PAYE at 40 % back in UK or can the 17% Angolan be offset against UK tax.


Angola does not appear on HMRC's A-Z list of tax treaty countries
Is there anyone that is currently working like this through UK office.


I understand i could escape UK tax by achieveing non-UK resident status but this would not be an option for me.

Is there anything other taxation implications I should be aware of.