jbl

After three attempts to get the HMRC helpline to answer and just waiting in an endless queue perhaps someone with some Tax knowledge or a more "senior" member might be able to answer this for me.
Next year I will be claiming back my deferred state pension as a lump sum. I know I have to pay income tax on it.
My question is how is this tax deducted ?
Is it taken off at source as a one-off lump sum deduction and that's it, I receive the remains as a tax paid amount…
or
Is the tax deducted monthly via my PAYE code over a twelve month period after I have received the total lump sum ?

If anyone knows the correct answer it would be appreciated.
Thanks
Brian.