Luckily I didn't have to do a thing to transport them to a higher realm, as there are only two lotties in the village the rats were spending most of their time in peoples back gardens eating bird scraps etc - so they were poisoned by said disconcerted residents. In fact I think the amount of poison laid probably could have killed the UKs entire rat population so the local ones didn't stand a chance.
Got the biggest shock in the spring though. I uncovered my compost heap to find the hind quarters of a rat sticking out - was huge :o . Fearing the worst (an active nest with little blighters making a beeline for my trouser legs - my OH has warned me about this - he had a nasty experience ::) ), I prodded said rat. It turned out to be long dead - slightly mummified and no evidence of rats at all in the compost - no nests nothing. It obviously came in to die. Not seen anything of rodent friends since.
I have seen lots of hedgehogs and no mysterious cat or dog deaths in the village etc so looks like all used the poison sensibly and targeted the pests.