Photos 2 and 3 were taken at 3pm just below the Walk Mill waterfall and the others were taken at 7pm a short distance above the Bushmills Salmon Fishery Station.
Added May 24
Still an extensive film of foam just above the fishery station at 11am on Monday morning. There has been a report of a discharge into the river but this has not been confirmed by NIEA. There is also a suggestion that the heat and low water levels could have led to plant debris floating downstream and being churned into a foam by the Walk Mill Fall.
Added May 25
Picasa Photostream Album: photos from May 23 and 25 - including slideshow.
Added May 26
The Moyle Council official who was to have checked out this River Bush issue on Tuesday morning has yet to report back. What exactly is floating on the river surface?
Click on images to enlarge.