OK, WTP and I planted some stuff this (late) summer. The poo wasn't well rotted enough, I think.
Anyhoo, getting sick of looking and nearly dead potato plants, which seemed to be growing rock hard green cherry tomatoes on, I dug them out tonight.
They were covered in white spots (like pimples) and had been bored into, the hole was similar to that made by the Veryu Hungry caterpillar.
So it emerges that while I was doing battle with the gazillion slugs in our garden, something was eating them from underneath anyway.
Help? sites to explain it? personal experience? All my spuds are going in the compost. ?