Particularly abundant on felled woodland areas, rocky waste ground, and often where you don't want them.
Common foxglove - Lus nam ban-sìth - Digitalis purpurea
They are a biennial, producing downie leaves only in the 1st year and the easily recognisable flowers in the 2nd year. Grows up to 235cm.
The Gaelic common name suggests they are for the women fairyfolk rather than gloves for foxes.
I took the photo because I was on @GwenfarsGarden@sunbeam.city 's Foxglove Challenge. It is for the same reason that I was so specific about the maximum height of 235cm. See this thread for details: