could do with some help identifying what i've done to my pepper plant. it starts off with the underside of the leaves turning black in patches, then it starts growing on the front. it's happened since i moved them outside, so i was wondering if, because of the typical english weather, it could be due to overwatering? or is it a nasty disease and the plants are doomed?

any help is very much appreciated

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[IMG]http://i51.tinypic.com/64ilas.jpg[/IMG]