Air Rifle Hunting, Feral Pigeon And Corvid Control At A Sheep Feeder

I was asked by a farmer if i could help with a problem he has with feral pigeons not only making a mess of his house but also eating the meal out of his sheep feeder which was also under attack by rooks, crows, magpies and jackdaws.
This is all done on farm land that i have permission to do so on with legally held air rifles and is done in a legal and humane manner as not to prolong or glorify the death of the birds.
This can legally be done through the Department Of Agriculture, Environment And Rural Affairs Wildlife (Northern Ireland) Order 1985 (As Amended) Licence.
This Licence hereby authorises for the purpose of preventing the spread of disease and preventing serious damage to livestock, foodstuffs for livestock, crops, vegetables, fruit, growing timber and fisheries ANY AUTHORISED PERSON to kill or take any of the following birds:-
Crow, Jackdaw, Magpie, Pigeon (Wood), Pigeon (Feral), Rook

Range Finder Bushnell Scout 1000
Rifle BSA Super10 John Bowkett Blueprinted .22cal 15ft/lb
Scope Nikko Stirling Targetmaster 4-16x44 LRX
Pellets JSB Diabolo Exact 15.9 Grain
Tactacam Solo and FTS unit
Equifix Shooting Bags Dutch Bag
The Bush Chair Hide