it's about a metre tall and the flowers that are developing are a pinky purple colour, and have no obvious smell. Thank you!
I think it is Liatris, or Gay Feather.
Looks like Liatris to me Shelley. Spikes of purply mauve, slightly plumper at the top than the bottom (rather than the 'candle' spikes of Veronicas) Bees love it!
Agree on Liatris.
Thanks all! It's growing in my mum's garden and she didn't know what it is. Thank you