Lack of indigenous fruitpickers has been a feature of uk life for decades.

https://news.sky.com/story/coronavirus-jobs-row-as-romanian-fruit-pickers-arrive-for-harvest-11974364

Not just a uk problem but an Irish problem as well
https://www.echolive.ie/nationalnews/Keelings-under-fire-for-flying-in-fruit-pickers-from-abroad-during-pandemic-3d726a2f-bb4a-4
and I am sure the folk song "Deportees" by Woody Guthrie was not about itinerant Bulgarians.
It will be a choice between making pickers essential workers or let the product rot in the fields with concomitant shortages and eye watering price increases.