Posted: 12/07/2014 at 21:21
If it's blight I would expect to see the stem of the plant going black, blight is a big problem on our allotments, so far this year we're clear but this is the time it strikes so if I was you I would check the whole plant carefully, if any of the stems have started to go black then I would put the plant straight into a plastic bag and bin it!
If its just the fruit then it could be BER. Fingers crossed its the latter. I have lost complete crops to blight, its a sickener.