Unknown large-leaved plant

Unknown large-leaved plant

Observation - Unknown large-leaved plant - UK and Ireland. Description: A large-leaved, tall plant (up to 5 foot) growing densely in a damp field close to a stream. Wondered whether this was an invasive Gunnera species?

A large-leaved, tall plant (up to 5 foot) growing densely in a damp field close to a stream. Wondered whether this was an invasive Gunnera species?