spuds planting dates?

First earlies take about 10/12 weeks from planting to harvest, and 2nd earlies take about 14 weeks to harvest.
so, IMO, working from say, June, you would still have time to plant and harvest well before the frosts

Put your chitting spuds somewhere as cool as possible, but still frost free, and in the light -to try and hold them back a bit, if you can.