cabbage abd PSB are hardy plants so wouldn't mind being planted out.
It's all the courgettes/pumpkins/tomatoes sort of stuff that will struggle till it warms up.
Mine are planted out, but I have plenty of seeds if I do have to start again.
But there's not a lot most people can do for their potatoes, they're too big now to earth up and it's too big an area to even think about fleece