In Yahoo mail, there was the function to allow the user to choose when they wanted mail to appear as Read, either straight away, after hovering a few seconds on the mail in question or Never. (Gmail has this function).
Is this function going to be added to BT Mail. I prefer to decide when "I have read" my mail and not BT, just because I happened to click on it (I may only be scanning the contents with a view to reading properly later). It's a pain having to go and mark each mail as read each time.