I don't think so apart from bracken control by helicopter apllication in the Scottish Highlands.
Hardwick and Ludham in Norfolk were bases for crop sprayers many years ago. I seem to remember Chafers had Bell 47's based at Bourn in the early sixties.
There are a few nice old pix on here
http://rides.webshots.com/album/5600...YGPUS?start=12
Tibenham in picture below
