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Don't forget it can be quite hazardous to touch this plant. Some people are very sensitive to the irritant it contains, and some even react to common hogweed with a very painful rash.
Thanks for the warning Bob (please don't look at the third photo). I was told afterwards that the Council is supposed to be felling these plants but hasn't done so.
Lat/Lng: 57.16, -2.2
OS grid ref: NJ880076