Offering help with pest rabbit ect.

Hey people my name is john breheny a 23 year old scaffolder from wigan I have been out weekend after weekend looking for permission to use my sub 12 ftlb air rifle to control rabbit population decoying pidgeon clearing out rats or anything that may be a problem to the general farmer but with no luck what so ever I have sent letters out to farms posted biusness cards more or less I would say I've exhausted all routes of gaining permission so would like to ask you're selfs how you would like to be approached if someone wanted to shoot on you're land aswell as if there is anyone with any pest problems on there farms that I could help the farmer take care of I am a hard working young man and ain't scared of a hard day's graft in return for days shooting I would be alone using a sub 12ftlb air rifle a daystate wolverine B type that I only take safe shots with and I would have the upmost respect for yours land thank you for reading my post john