It has become apparent that if you only watch BBC content via the iPlayer then you do not need a TV license because said license is only required if you are watching programmes as they are broadcast. So, if you subscribe to Sky+ and watch BBC content from recordings (or just press pause for a few seconds <g>), then you don't need a license. Similarly, I suppose Freeview and Virgin Media et al systems that include the ability to record.
What I am not sure about is whether this watch as broadcast applies for other content providers - but, doesn't matter, there is the pause button.
Hmmmm, might be heading for ooops land this one.