I've been in the audience for an episode of Dead Ringers (the tv series) at Television Centre. I recall Jon Culshaw being dressed as Blair and in between takes asking someone if his Ozzy Osborne 'tattoos' were visible under the suit, before saying "Sharon, I'm the f**king prime minister". We also saw quite a bit of pre-recorded material, which was featured across the rest of the series.
"Listen, we've all got something to bring to this conversation, but from now on what I think you should bring is silence." - Rimmer