Of course, some long sunny days would really help them along but beggars can't be choosers!
A few of the potatoes have got early blight which, although nowhere near as serious as late blight, has forced me to lift some of the plants and dispose of the tops.
The concentric rings on the affected areas are a characteristic of this fungal disease. On those plants which are only mildly affected I've removed the damaged leaves in order that the tubers will continue to bulk out. That's my hope anyway!