MP who used public transport after testing positive for coronavirus.Shamed Margaret Ferrier has refused to step down from Parliament despite being suspended by the SNP.The Rutherglen and Hamilton West MP travelled from Glasgow to London by train with Covid-19 symptoms in September and then made the return journey after testing positive.The politician referred to the incident as a “blip” and claimed the virus had made her act out of character.The Metropolitan Police in London said they would not take action but Police Scotland have confirmed the case remains under investigation.In response to a letter from Labour MSP Jackie Baillie, Assistant Chief Constable Alan Speirs wrote: “Police Scotland is aware of the decision made by the.