Is tax due in the UK on an IRS tax refund - that is transferred to the UK?

I am a UK resident tax payer. I am shortly going to start withdrawing amounts from my US based 401K account. Thsi will be periodic payments and thus I understand that tax will be due here on those amounts and I will declare it as foreign income and pay as required. The 401K provider will have to withhold an additional 30% of anything I withdraw as is required by the IRS. As a non-resident of the US I can then claim that 30% back annually with a 1040NR tax filing sent ot the IRS. I then intend to transfer that tax refeund back to my UK based bank account My question is whether UK tax will be payable on the tax refund amount when I transfer it to the UK? ie - is the tax refund from the IRS also treated as taxable income by HMRC here in the UK? Thank you for your help.

Hi ,
 

You would declare the gross pension payment (this included the tax paid in the USA) in your self assessment tax return, so that the UK tax liability can be calculated.  Any foreign tax refunded does not need to be included separately on the return. Thank you .