TAKE ME HOME: Useful information reaches us from Graham Swallow:

Re: your question about the whereabouts of the subliminal 'Read My Lips' msg. It was rather oddly hand-written on a scrap of paper stuck to the front of the (original Victorian) fireplace via a substance I suspect to be blu-tac, or as Blue Peter would describe it, a  sticky coloured plasticine.
 
I noticed it at the time, but didn't pick up on the relevance, but it was just strange and out of place....

Thanks for that, Graham...