Just thought we'd do something abaht ye olde Suprima 80 (Lockouts R us) boiler.
Ordered up a CETLED PCB and fitted same. Thought we'd clean all the usual detritus out from the bottom inside case and apart from all the usual wasps and other bits there was a Mouse tail;!..
Further investigation revealed the rest of mousy wedged beside the case and heat exchanger still intact with a rather pained looking grin on his/her face!..
So it climbed some 10 feet up a fairly smooth brick wall and out to the end of the balanced flue and in and then down not able to get back out..
Poor little sod .. what a way to go;(..