I can’t help but feel sympathy for Lord Geidt (Boris Johnson accused of corruption after ‘great exhibition’ text emerges, 6 January). “Ethics adviser to Boris Johnson” must be an even more thankless job description than “honesty adviser to Richard Nixon”. Tony Green Ipswich, Suffolk Jake Wallman says he was born in a different millennium to his twin (31 December). But of course he wasn’t: 31 December 1999 and 1 January 2000 are both safely within the second millennium CE, which ended at midnight on 31 December 2000. No doubt there are unsung twins for whom the quoted words are true! Hedley Stone Southam, Warwickshire Re Margaret Davis’s roses, and others who report unseasonal blooms (Letters, 4 January), last week the lemon tree on my city fifth-floor balcony produced four beautifully scented blooms. While having my morning coffee I noticed something moving in the leaves: it was a tiny wren, busy scoffing the lot. My question is: how did it know? Rosalind Napier Birmingham The bus services in my boyhood pit village were all labelled with a letter and a number, such as C4 or A2. Hence, while singing at the chapel Sunday school, I believed the Christian soldiers were urged onward to Nottingham as they were “going on B4” (Letters, 6 January). Philip Clarke East Bridgford, Nottinghamshire Have an opinion on anything you’ve read in the Guardian today? Please email us your letter and it will be considered for publication.