Boris, Lyndon and Johnsons in the tent | Brief letters

Paying extra tax | Universal credit | Gun control | Theresa May | Boris Johnson | Notes and QueriesSorry to be a pedantic killjoy, but you can’t voluntarily pay extra tax (Letters, 4 October). If you pay more tax than you owe, it will sit as a credit on your HMRC tax account to be offset against your future liabilities. You can send a donation (not extra tax) to the exchequer, but if you have spare cash and want to do good, give it to food banks and other charities that directly support th