This was the reply I got when I asked a few weeks ago....
Sorry for the delay in getting back to you, but I was away when your first e-mail came through and have been trying to catch up ever since.
In answer to your enquiry, until recently, the council did not have any micro-chip scanners to use when responding to reports of dead animals (both cats and dogs the same).
However, we now have purchased a couple and our contractors are due to be trained (early Feb) in the correct use of these so they can in future scan the animals to see if they are micro-chipped. Until this training is carried out I cannot yet comment on the process of then notifying owners/the micro-chip company of the found animal.
Currently though, when our contractors respond to reports of dead animals a description is recorded and if the animal has an identification tag on the contractors will endeavour to make contact with the owner/details on the tag. Unfortunately, many of the animals found are not wearing any identification tags so they are unable to do anything other than record the description and remove the animal.
Due to storage capacity, our contractors cannot keep any animals found for later collection by the owners – the owner can of course collect the animal from the site it is found if this can be arranged between the owner and our contractors.
I hope this answers your question – but please come back to me if you have any further queries.