Ok, to clear up any confusion....the three small pot pensions I have been offered are two tiny pensions (residue) when I transferred the main amount from Prudential to another company. The third amount is from when I contacted out of SERPS for a short time. These pensions were taken when I retired, 25% tax free lump sum, then the rest paid as pension.
Evidently, due to pension changes, these small pots can be offered as a wind-up deal.
At the moment, the amount I receive from State Pension exceeds the Personal allowance (PA), so the amount more than the PA is added to the SERPS pension, then taxed at 20% and that tax is taken from my monthly payment from them.
So, on that basis, I assume the amount I receive over the PA, will be added to the £8500, then this amount taxed at 20%, and taken from the £8500. I will then receive no more payouts from the pension company.
Obviously I have already paid a bit of tax on the residue this year, and assume that this will be adjusted at the end of the tax year.
My main private pension, from another company, is taxed at 20%, and again, I assume that come the new tax year, my residue over the PA will then be added to that pension for tax purposes.