I attended the mayoral hustings in London this week with an open mind (Editorial, 11 April). Ken Livingstone was impressive, on top of his subject, while Boris Johnson was surprisingly weak on substance and detail. He repeatedly dismissed Livingstone's arguments by saying Ken wasn't telling the truth. In doing so, he was found out a number of times, in particular by Jenny Jones the Green candidate. Livingstone's proposals will unquestionably improve the lives of Londoners. If folk are looking for a laugh, they should go to the Comedy Store.
Richard Cohen
London
• Toby Muse (Medellin's renaissance blown apart by gang rivalry, 11 April) ignores the great progress this city has achieved. From 1992 to 2011, there has been a drop of 72% in the homicide rate. From 2009 to 2011, there has been a reduction of 25% in the number of violent deaths. Medellín's renaissance is strong and healthy, thanks to the successful work of its local authorities with the full support of its citizens.
Mauricio Rodríguez Múnera
Ambassador of Colombia
• Here in the Isle of Man Guardian readers are an endangered species (Letters, 12 April). Our rarity is such I'm minded to establish a club to ward off extinction (john.sissons@hotmail.com)? You never know, it could be the start of a movement with local branches in places where guardianistas feel marginalised.
John Sissons
Ramsey, Isle of Man
• "We don't sell papers like that here, duck," Chesterfield Royal hospital, last week.
Daisy Hegarty
Matlock, Derbyshire
• Did Francis Maude write your editorial on the "average Briton" and his/her garden shed (In praise of… , 11 April)? He recently assumed we all have garages.
Dr Alex May
Manchester
• Since you are obviously a fan of this particular item of temporary accommodation, may I draw your attention to a small YouTube video on the subject called In Me Shed, introduced by Lisa Rogers from Scrapheap Challenge.
David Walker
Dudley, West Midlands