Leaf mines in a Hogweed leaf.
No interactions present.
See comments from an expert on this and a possible alternative species on hogweed here http://www.ispot.org.uk/node/267717
University of Edinburgh and Biodiversity Observatory (OU)
The more you know, the less certain you become about almost everything.
It certainly helps to know what you don't know!
Lat/Lng: 51.350461666667, 0.072206666666667
OS grid ref: TQ444633