Marks and Sparks: Greenest brand

'These are not just flesh-coloured, reinforced-gusset period pants, there are M&S flesh- coloured, reinforced-gusset period pants...' Greenbang thought that Marks and Sparks was best known for selling Britain's underwear and gastro-porn adverts, but no, apparently, it's also the top in the FTSE 100 for green brand-ness. Apparently, according to a survey of opinion formers (Greenbang thought…