Blue 197 & 200 M5

[alex.]

M5 northbound tonight, the 197 was approaching 11a and had a private plate which I couldn't catch. The blue 200 was just passed junction 12 travelling northbound as well. I was on the otherwise of the carriage way in a Vauxhall Latte or whatever it's called! I'd say it was between 16:55-17:00 time wise