Unknown plant, any ideas please

Unknown plant, any ideas please

Observation - Unknown plant, any ideas please - UK and Ireland. Description: Around 7 feet tall, hollow green coloured bamboo like stem, green leaves with fuschia like flower. Leaves are approx 3 long. The stems come from one main tree like stump (see second photo), unlike bamboo.

Around 7 feet tall, hollow green coloured bamboo like stem, green leaves with fuschia like flower. Leaves are approx 3" long.

The stems come from one main tree like stump (see second photo), unlike bamboo.