Blowin’ In The Wind

.......... a bit more pruning and general tidying in the garden - no point in clearing up any leaves yet as there’s still lots to come.

Does anyone know what the plant is in extras - it has popped up in one of the pots and I don’t recognise it. It’s currently about two feet tall and has grown quite quickly, so I suspect it could be a tree or a large shrub. It can’t stay where it is but I need to know what it is before I decide whether to pot it on or dispose of it ;-)