We grew Desiree and Rocket last year and had good yields from both. However, the desirees held a surprise. When we dug them up, we had a few with the usual slug damage but the majority were good sound spuds-so we thought! On cutting some open I found a small cavity containing upto 5 woodlice. There were no holes or tunnels and nothing to indicate there was wildlife hiding out inside! Consequently I haven't dared use any of them for jacket spuds!!!
The rockets were unaffected obviously because they were not in the ground as long. My husband reckons it's something to do with using spent mushroom compost instead of the usual good muck as it hasn't happened previous seasons. It would seem mummy woodlouse thought "woohoo! nice des res" and laid her eggs. I don't mind creepy crawly critters but I have no desire to do an impromptu Bush Tucker Trial ta very much! 
Regards
