The General Licence.
Below are the Government links to the information about the General Licence that is full of advice for most pest control issues.
Dear Sir, After spending my whole life shooting I realised it was time to give up my guns as I was getting too tired to be carrying them about to get the vermin on my land as they were all too heavy for me, so I called in to see what they were worth. I am delighted I did because you were so understanding and realised I was saddened by the prospect of not doing a bit of hunting now and then so you recommended I sold all 4 of my guns and bought a light weight modern air gun. I had no idea how technology had moved even into the gun trade so now I have the best of both worlds. I can still get some exercise and fresh air, keep the rabbits off my garden and I am not given chores by my wife because I am too busy. Thank you for making me feel young again and I hope I did not take up too much of your time. With regards,Andrew