Coming back from work and just joining the A4 from the Chiswick Roundabout. 2 Police bikes with lights going stop all traffic on the slip entering the A4. Police biker saw me and let me go (obviously as I'm on the awesome Blade!) but all other traffic stopped. He was blowing a whistle at the traffic to stop it I thought was strange. So I travel along the A4/M4 and another police biker passes. This guy is like a filtering wizard and was absolutely blasting through the traffic. As I approach Heston services I notice a couple of bikes just at the exit of the services back onto the M4. There were 2 bikes. One police bike and what looks like an undercover bike, possibly a blackbird, just waiting there at the exit. Nothing else to tell, though it was a little strange!
It's only the Special Escort Group aka SEG working. They ferry diplomats and royalty etc around so nothing for you guys to worry about