I overheard a TFL worker talking about the Bakerloo line (here in London) apparently having vast sections of the tunnels covered in asbestos and it would be too

I overheard a TFL worker talking about the Bakerloo line (here in London) apparently having vast sections of the tunnels covered in asbestos and it would be too expensive and too dangerous to ever remove so every few years they spray the inside of the line with basically glue to stop it from breaking up. I try to avoid taking the Bakerloo line these days...