this is what you do, buy a good air rifle 2nd hand that way i got a £400 gun for £150, no licence required, then you buy off ebay a vermin call cd, i have one it plays fox calls, rats eating, rabbits in distress for foxes and loads more even elks, havent seen an elk in norfolk lately, then you buy a personal cd player from asda £5 and an extension speaker £5 with a built in amp and a red light torch, at dusk you place you cd player in a good place put the cd on RATS and press repeat play, then sit around and wait for the rats to come out and then use you air gun, a 410 is better as easy to hit a moving rat. NOW THESE CDS WORK, i used mine 2 times the rats came out, then next night i didnt use it and they didnt came out, used it again and they came out, going to use it again any day now.