What is this plant??!

[NotGreenFingered]

This plant has grown from a packet of cherry tomato seeds. The rest look like cherry tomato plants but this one does not! It's definitely not a cherry tomato.

Can anyone identify what kind of plant it is? It's growing well and is approximately 16 inches tall now.

Thanks

Ps the one behind at the back (just seen) is a cherry tomato, it's the front big one I can't identify.

I think that is a weed. Maybe redshank (Persicaria maculosa)?

I think you are totally right . Off to yank the imposter up immediately! Thanks for your help. I could have grown it all summer and been none the wiser!

Happy to help...Definitely get rid of it before it seeds everywhere!

It looked so promising through!