Travelling home to Somerset from Heathrow along the M4 I was grateful to be warned, on numerous occasions, that there were long delays from J13 to J24 on the M5. However, these warnings did of course omit one important piece of information. Were the delays on the northbound or southbound side, or both? I suspect this is a regular occurrence and am not sure there is room on the signs for this additional guidance. To whom should I write to point out this shortcoming?