quiz monkey is right,
i went to see a fools and horses being filmed years ago, it was a christmas special... remember the peckham spring water one? lol ... and yeah they showed the outside scenes on monitors and recorded the studio audience laughter as we watched them. while these scenes were being shown to us, del and rodders came and stood right by where we were sitting on the front row. it was great seeing it filmed, although it did kind of spoil the 'belief' that they really did live on the 15th(?) floor of nelson mandella house lol ..
oh and i also came away with an actual bottle of the 'peckhmam spring water' !
it was a nice experience and will always remember it.
:o)