Method Used To Inform Other Riders

We do exactly the same motions here stateside. Tap top of head = Cops ahead. Circular motion with boot = potential road hazard.
EDIT TO ADD - I learned these motions from nearly half a century of riding Harleys. Sportbike guys may have newer road codes. Interesting topic here.

 

Camera van at the side of the road, was warned by a car driver, with thumbs down.
Couple of miles up the road, there is 12 HARLEY riders, flashed them and thumbs down. Not one of those miserable feckers could be arsed to acknowledge me!!! What a bunch of total cocks

 

Lesson learned there then Mr O.
I nodded at a few Harley riders whilst out riding today and couldn't detect any acknowledgement.
Mindst you I was on horseback.

 

The group was bunched up behind a tractor, not till I got up to them did I realise the were H*rley riders, should have known, every other brand of motorcycle can out accelerate a tractor !!!!!

 

Always used the tapping the lid for police warning (not just speed traps) and various other situationally appropriate hand signal (innocent whistle ) I saw this picture recently which I found interesting, obviously for riders in convoy, but good for group communications.

 

The petrol one could get mistaken for going to get a fish supper...

 

Great chart, but I'll never remember all them.

 

I guess You would if that was how you ride... the biker groups who ride in long trains may be aloof to other bikers, but know how to communicate amongst each other. I rarely ride with more than 3 others, but still gesture between each other.

 

Here's one waving at you

 

I've mostly had flashed lights from other motorists as warning of impending "Safety" camera. However, today I was warned by a bus driver, using the charades sign for "film", (i.e cranking fist). Never seen that one before, but I twigged instantly.