The whole Vaping epidemic on the tube is beyond a joke now! I was in London a few days ago, and rode the Piccadilly, Bakerloo, Central, Northern and Elizabeth Line. The graffiti on the Central and Bakerloo is ever worsening, though I did see that graffiti-proof shiny adhesive material has been applied to the 1992TS window surround areas, which seem to be heavily targeted by the taggers! I travelled on the Bakerloo from Kenton to Baker Street, and saw gangs of board youths board from Stonebridge Park onwards. Merrily vaping their lungs out, despite the service being relatively busy from Wembley Central onwards! One wondered what the parents with pushchairs at either side of their seats thought.
Again on the Central Line from Debden to Epping, gangs of undesirable youths about a carriage from mine, were acting suspiciously alighting and boarding randomly, and had what suspiciously looked like thick marker pens in their hands! On the Elizabeth Line despite it being a very busy service, more youths vaped away and were also playing terribly inappropriate loud music from their phones. Obviously completely oblivious to the wishes of their fellow customers. The Northern Line was just grimy, though the was no evident vandalism in the train I rode. Infact the Piccadilly Line, which I rode quite a long time from Holborn to Uxbridge, was undoubtly the the cleanest line I rode. Despite the age of the 1973TS they have been kept in remarkably good nick throughout their latter life.