What to do with my pot grown potatoes ?

Depends on how many you have got, they will come to no harm in the soil unless the slugs find them, also any too near the surface might get green (and should not be eaten as they are poisionous then) When the winter comes the frosts might ruin any pots near the soil surface,. If I was you I would pick them now, dry them and store in a paper bag in a cool dark place, they should keep for a few weeks like that indoors.

Farmers and the very keen sometime store large quantities of pots in a clamp (buried underneath a deep layer of soil) outside and they will last until next spring.