You may well already donate to charities, either personally or through corporate fundraising, and therefore might feel there’s no space in your life for another one. But not all causes need to be supported financially and not all require you to give up valuable free time.

Indeed, some could benefit from you simply making use of dead time sitting on delayed public transport.

A number of charities cite writing a letter as an important means of support. Among them is Post Pals, supported by Children in Need…