BBC Radio News Style Guide
ShareThisBBC Radio News has posted a very helpful guide online to writing for radio. It's concise, clearly written and covers things such as getting the tone of story right and using only spoken English. The guide also includes a link to a detailed list of alphabetical rules about such things as the overuse of the word "but" and the misuse of the word "ironically." Some of the advice is specific to British journalists, such as the rule forbidding the use of the word soccer for football. But most of the advice would be valuable to Canadian journalists and journalism students.