In past years, Lynda, as you say, the TV guide companys state in their previous issues that the Christmas issue is available on say, Tuesday 11th Dec, or earlier.....so that leaves it open that if they want to release it before that date, they can...the shops put them on shelves earlier, with the previous two editions near them. Confusing innit! lol
If you dont get your copy of Radio Times, if thats what you prefer, by Tuesday, Lynda.... I'll treat you to any dinner date of your choice....howzat? :) xx