I'm thinking blight

[FoxHillGardener]

I've not had a warning but I'm sure this is blight on my Ratte potatoes
Chop 'em off and hope it dries out a bit for a few days to harvest. It's not on any of the other types yet, but think I should do the same with them all. Curses

[Aberdeenplotter]

Looks like blight. I'd have the tops off them but would wait to see if the others manage to avoid it.

[scarletrunner]

Registering with blightwatch is useful if you havent already,gives up to date warnings for any postcode.Allows time to take precautions such as Bordeaux mix spraying to hopefully prevent infection.

[FoxHillGardener]

Registering with blightwatch is useful if you havent already,gives up to date warnings for any postcode.Allows time to take precautions such as Bordeaux mix spraying to hopefully prevent infection.

Yes, I'm registered with them but didn't get a warning this time. Looks blighty to me though, yes?