How about working after Retirement Age?

Harry Monk:

Santa:
Also, note that NI is not payable after pension age which gives you an automatic 10% (or so) pay rise.

ISTR that this has changed now or is going to change, possibly for those retiring after a certain date?

The change was that all working people above retirement age had to pay the 1.25% levy. But that will be stopped on 6 November '22.