I would usually let this go, but the fact that this person is a Taxi driver and serves the public really got my back up! 
Coming along the 540 towards Heswall this guy keeps attempting to undertake even though I couldnt move anywhere.  Eventually makes a REALLY stupid manouvre and flies past, (remember Im doing the speed limit of 60), then keeps slamming his brakes on and giving disgusting hand gestures.  I made sure he knew my wife was taking his details and we were going to report him, lets see what they say at the council about his taxi licence.     Cab No.  2005 Cheshire west and chester. 

VERY dangerous driving and attempting to cause a collision on more than one occasion!

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