This was for a 135 mile journey, mostly M23, M25 and M40. I've done worse : 27 mph the same journey. Sometimes you wonder whether to take the car out or not. Crawling arounf the M25 has become my recurring nightmare : you've got to plan for lengthy delays with a tank of furl, water and grub. At least I had our teenage son with me so I got to hear and ask about a subdtantial part of his iTunes playlist.