Rats!!

[Midnitemo]

Air rifle would be my first choice , followed by a small bore shotgun .410 most likely(possibly (9mm RF)....look on guntrader if you decide shotgun...from about £25 and up used to about £150 and up for new.....if you go with a cheap air rifle then the trigger is the most important thing...all cheap air rifles are decently accurate and fairly robust nowadays but a good trigger makes all the difference.

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Chiappa badger is an interesting little shotgun...might be worth a look...folds up quite compact and weighs very little...only down side is the 9mm rf cartridge is not very manly and can be difficult to source and pricey comparatively...failing that there are many singles to choose from and you can't go wrong with a Baikal.