many tall spires of tiny purple flowers

Can anyone tell me what this is? It has popped up in my garden growing to a meter or more in height and aggressively self seeding. Individual flowers are 10 mm or less.

 

Not getting anywhere with the attachments ("Invalid Link") and the height is a bit much but otherwise it seems it could be Linaria purpurea.

 

Thank you! That's exactly what it is.

- Karen

 

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