False grass-poly

I've been very engrossed in report writing, so field time has been limited. Nevertheless I was surprised to find a plant I didn't recognise at all on a quick dog-walk to Ferry Meadows. It was growing in a shady area along the old route of the A47. At first glance I thought it might be a weird purple loosestrife Lythrum salicaria, but there were only one or two flowers in each axil. In Stace it keys out to false grass-poly Lythrum junceum, a casual bird-seed alien, though I have to say it was an unusually robust specimen. Certainly people do scatter bird seed close-by, and this could be the source. It seems to be only the second record for VC32!