Surrey,
United Kingdom 
Saw this beautiful view this morning where i live and wonder what the plants were and found out they were Physostegia lions heart obedient plant. And wondered why someone would grow a crop of these?. Only reason i can think is they attract bees.
28 May, 2020
Answers
Can you take a close up of the plant so we can get a better id Alastair?
28 May, 2020
Previous question
« I need to cut part of my tree away,it's growing too big for my garden,can you...
Phacelia, a manuring crop.
28 May, 2020