On my way to Carlisle yesterday afternoon I had a close shave. Approx 20 miles south of the M6 I was filtering stationary traffic on the M5. I was travelling at speeds from 20mph to 25 mph between the middle and outside lane and both wheels locked into a rut in the different road surfaces. The middle lane was in a terrible state of disrepair and I could not pull out of the rut due to cars either side. Gave me a scare, but fortunately for me I managed to keep control until I came to a stop. Could not believe that I would come across such a hazard on probably the busiest stretch of road in the UK.