I tend to grow the mini-cucumbers, the all-female F1 varieties, as there are only two of us. I've tried outdoor ones but it's just too cool and breezy this end. Likewise outdoor toms. Hopeless here. I lived in Loughton, Essex, for eight years and had an allotment, and outdoor toms were a cinch there. Probably a similar climate to yours in East Anglia. Usually, I see blight on my spuds first, and they are doomed. As long as it doesn't strike too early, and I've cut the tops off in good time, it doesn't get to the spuds and I get at least something of a crop. But it always gets to my tomatoes. I won't spray them with that horrid copper sulphate stuff, so they just have to get on with it. I take off the blighted leaves as much as I can. Tomatoes are very resilient though, given good feeding and watering. My tomatoes got blight in the second week of July last year, but I was still picking embarrassingly-large crops in late October!