I’ve had a look around the border and can’t see another hole to make it s tunnel. I will ask my neighbour as the border is on the fence divide to both our gardens. I think I will get it dealt with rather than leaving. Thank you.
We put some paper down the hole and some sand at side to see footprints but the paper hadn’t been moved for a week until last night. The hole this morning is twice the size but there isn’t any footprints.
That looks like a rat hole to me. I've had them on/off in the back garden for over a year. I put some bait down and see if it goes. Keep filling the hole in, if it reappears with similar shape/size you can be almost sure it's rats
It's far cheaper to buy a rat bait box and the bait to DIY rather than calling in a professional. It's quite easy to do if you follow the instructions, wear plastic gloves (and throw them away after use). The rat (if it is a rat) will go into the box, eat the bait and go and die elsewhere.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.