Razor

I had similar recently, came round a corner onto an A road, from a 30 zone to a 60 zone and rolled the throttle to the stop. I have a stubby can and it's kinda loud so a van that was in the right hand lane moved, kindly to the left... Or so I thought, meanwhile he had moved because he saw the flash of flouro yellow and the hairdryer in the coppers hands.
I only saw the cop as I passed the van, he swung the hairdryer at me and I grabbed 2 fingers of brake... The van and I then passed him at the same time... Why was he there? Road works and he was standing under the 30 sign... That was 6 weeks ago, not heard anything yet.