Narrow-leaved Michaelmas-daisy (Aster lanceolatus)

Narrow-leaved Michaelmas-daisy (Aster lanceolatus)

Observation - Narrow-leaved Michaelmas-daisy (Aster lanceolatus) - UK and Ireland. Description: Usually about 1m high and quite robust forming stands of several meters length. Flowered early Sep with numerous small flowers. Any ideas if indeed an aster which one?

Usually about 1m high and quite robust forming stands of several meters length. Flowered early Sep with numerous small flowers. Any ideas if indeed an aster which one?