Hi fogmiles,
You would be taxed as normal as the payment is in the new year.
If not working for a period, you can apply for an unemployment repayment every 4 weeks until your tax is at the correct level or you return to employment.
HMRC cannot advise you on rejoining the pension as this is financial advise which we are not authorised to give.
Claim back Income Tax when you've stopped working (P50)
Thank you.