Flower/Plant Identification
That is Himalayan balsam (Impatiens glandulifera).


  Tall, stems often reddish. Lvs opposite or in threes, with small red teeth. Fls large, pale to dark pink-purple, with short bent spur; July-Oct. Bare places, especially by streams.


The Wild Flowers of Britain and Northern Europe. Fitter, Fitter, Blamey. 1974. Collins, London.