There may already be a thread so apologies, SWR are currently airing a TV advertising campaign, I expect in the Meridian area only, which features a train running "wrong line", it may go unnoticed by most viewing public. This is not the first time First Group adverts have shown this, in their GWR "cartoon" advert the train/s also ran "wrong line". One might have hoped that when the advert was approved for broadcast someone with some operating knowledge would spot this or am I being a pedant, answers on a postcard?!