In my younger days I often drove tractors between farms in Oxfordshire and due to limited overtaking opportunities it was commonplace for tractors to pull over and let backed up traffic through, not anymore it seems. Yesterday I drove down through a notorious tractor hotspot called Lincolnshire and three times got behind tractors for miles of 20mph travel. One guy must have had 1/2 a mile or more of traffic backed up over a 10 mile route and passed numerous opportunities to let traffic through. A sign of the times I guess?
Ironically I was traveling through there yesterday on the A17, a major through route, and suffered exactly as you describe. One smaller tractor/trailer was raising the dust with one wheel on the verge so at least most could squeeze past in fairness. I know it's a busy time of year for farmers but although I travel this route regularly it was the worst I've seen encountering maybe half a dozen in a ten mile stretch.
