"ways of making the lorries more efficient, saving fuel, lowering emissions and improving air quality"
How about investment in electric lorries and green electricity production - just a thought. This platoon / convoy idea is not what UK road haulage either needs or wants from a user perspective, just a cheap means for those in office to brag about being 'Green' when it's a mere sticking plaster tinged with green. It's would seem an idea more suited to roads systems spanning millions of hectares of broad flat lands.