This thread is 13 years old and the OP was in England. There are plenty of threads on here about regenerative grazing. It may not be called that in the title, but they are here.
You should read some of the work by Dr. Temple Grandin. She explains a lot about cattle behavior and building facilities. It does not have to be expensive to be safe and effective.
It seems like I read once that, depending on the fat cover, most tenderization occurs during the first 7 days of hanging and days after that, intensifies the flavor.