Freezing ham

Not precisely the same, but I’ve kept cooked gammon in the fridge for a good couple of weeks. Usually in winter though (the C-word gammon).

How about making a pea and ham soup, and freezing that? Or chopped up bits in any vegetable soup, come to that.

Me too

I have often frozen ham..

I've frozen sliced, cooked ham successfully. Seal in bag and when taking out of freezer, don't open till thawed, otherwise condensation will make it wet.
Sometimes I dice it up for use in dishes like pasta carbonara or ham and mushroom pie.