It looks a bit like 'Lobelia_Queen Victoria' but don't quote me on that! Google it and see if it resembles it at all. I have one which looks like yours, it has the name.

It does look a bit like lobelia cardinalis...but just doesn.t if you get what i mean.

Ive just planted some penstemon mystica at work at it looks similar to those

it looks like my Lobelia 'fan series' a shorter version of queen victoria.

My first thought was Lobelia queen victoria.

If the leaves come in pairs--as they appear to do--it may be one of the bronze-leaved lobelias, such as 'Husker Red'

Thanks everyone