Hi,
Article 18 of the UK / Singapore tax treaty allows for UK pensions and lump sums to be paid free of UK tax to residents of Singapore.
The pension provider will be required to deduct UK tax from the pension, until such times as we are able to advise otherwise.
Once you commence receipt of your pension, please download and fill out form DT individual:
Double Taxation: Treaty Relief (Form DT-Individual
The signed and completed form should be sent to the tax authorities in Singapore to validate.
Once validated, the form will be returned to you, so that you can send it to HMRC at the address on the front page of the form.
Thank you.