One summer I was going out to the garage to find some humdrum household item or other, when I glanced through the mucky windows of the Capri and noticed something out of place, stuffed down the sides of the rear seat. Opened the door and was greeted with that unmistakeable stench of mouse piss 
Dug the car out from underneath a tonne of boxes, dropped it off the axle stands and rolled it outside so I had room to get the seats out to assess the damage … and to be able to breathe.
The squeaky little fckers were nowhere to be seen, but they’d obviously been inside the seat base for some time, though thankfully hadn’t been able to then get out into the rest of the car. They’d chewed through half the insulation that’s glued to the floorpan and had a go at the plastics and the frame, then I guess they buggered off back out from the hole through which they got in. It looks like the boot floor sits on top of the rest of the floorpan at this point, and these three channels go into a void where maybe rust has made enough of a hole for Mickey and his mates to get in. 
Stripped out the whole lot, attacked everywhere with disinfectant, blocked off the holes as a temporary measure until I could find out where they went and put loads of coffee grounds in the car to absorb/mask the smell. Added a Magic Tree too, for good measure.
Bollocks… 