I signed a similar petition against Sadiq Khan's plan to scrap Travelcard tickets that give a reduced price for passengers travelling into London out of peak hours. It seemed illogical to me that the person claiming to want to reduce the number of vehicles in London would increase train fares thereby encouraging people to drive. I'll be honest, I nearly didn't bother with the petition because I thought there was no way that Khan would back down, I was shocked to hear that he has done just that. Whatever next? Politician's listening to the electorate.
Mind you, I wouldn't have thought there's much chance of him getting re-elected.