Tell me about it, my bus up the northbound M1, which is not so bad. But the southbound M1 south of J13 is an absolute nightmare. Many times there are accidents. Even on good days there is queueing. The other day there was an accident involving a petrol tanker and the road was closed altogether, although the motorists already on the road were trapped there.
When I drive to Luton Airport from Leicester, I go down the A6 these days. Takes much longer, but much more relaxing!