It looks like a valerian Klahanie, plolific self seeder there's a white version to loved by bees and other insects :-)

I think it's Latin name is Centranthus, hopefully somebody else will confirm.

Centranthus ruber

Thank you very much. Seems like it can be invasive in different parts of country but it is well behaved where I have it.

Yes there right and it also comes in pink and white.

Thanks for the confirmation Roy.