As campaigning enters its last week, both sides accept the gap between yes and no is narrowing.
But he said that he would not mind if ITV or another broadcaster brought Poirot back, adding: "I think there would have to be a generational gap, but yes.
If some recent opinion polls showing a far tighter gap between yes and no are correct (ICM recently suggested it could be as tight as just 4% apart, once don't know are excluded), that could be enough to ensure yes would win.
The three men have been drafted in by Better Together and Scottish Labour along with Gordon Brown, the former prime minister, and Frank Roy, the Labour MP for Motherwell and Wishaw, after a series of polls last month showed a shift in support towards independence, cutting the gap between yes and no votes.
Obama's remarks are a setback for Alex Salmond's government and the wider independence movement because of the US president's influence on centre-left public opinion, at a time when opinion polls show a narrowing gap between yes and no votes in the referendum.
The BES, a long running government-funded programme, surveyed the same group of 6,000 voters twice this year – in February to March and May to June – and found the gap between yes and no had tightened by three points, after excluding the 2% who say they will not vote.
The parameters for BlastN program were as follows: Expected (E) threshold = 10, comparison matrix = Blosum62, alignments to show = 100, allow gaps = yes, filter = yes.
The search for protein homologues was performed by pairwise alignment with the tool "BLAST" (BLASTP 2.2.26, Sep-21-2011, implementhroughough NCBI), as provided by the server, with the following parameters: database - UniProtKB, Threshold - 0, 1-0,0001, Matrix - Auto, Filtering - None (for proteins)/Filter low complexity regions (for peptides), Gapped - yes, Hits - 250.
