Of course tube drivers are important for keeping London running smoothly (Letters, 11 September). But how about a mention for bus drivers who, when working hours and holiday entitlements are taken into account, earn about half of what a tube driver earns? Is driving a tube train really twice as difficult as driving a bus? Also, London bus drivers carry a million more passengers a day than tube drivers.
Andy Smith 
London
• Boris Johnson was paid £5m from 34 paid appearances (The Boris Files, 9 September). This is an average of £147,000 per speech – proof that there’s a lot of money in flannel, wiff-waff, waffle, bluster and blather.
Toby Wood
Peterborough
• Liz Truss’s spokesperson has said that her claim for the public duty costs allowance relate to “ongoing public duties” (The Boris Files, 9 September). I fail to imagine what such public duties might be, particularly as she showed no interest in serving the public while in office.
Stephen Rafferty
Bideford, Devon
• With respect to giving way to other drivers (Letters, 11 September), my son-in-law and I have both noticed that if you let a car in, the driver shows their gratitude almost immediately by letting another car in. Kindness to one leads to kindness to another.
Peter Branston
Brentford, London
• Re Banksy depicting a British judge with an American gavel, it’s called artistic licence (Letters, 11 September).
Henry Malt
Huntingdon, Cambridgeshire
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