@Stella you’re a genius. I knew you would crack it, but so cleverly, you haven’t revealed the deepest secrets of the labrynth, you just lifted the curtain a fraction of a centimetre. The DaVinci code is amateurish in comparison with the SNF code.
That’s its irresistible appeal! 
Thanks you Stella and Peter, it is now all clear ! Et comme diraient mes voisins:“Au Trésor public ils nous prennent pour des saucisses !”
Time for mortadelle
I think that maybe I have confused Mornington Crescent’ with ‘Just a minute’ !
Of course being British we must talk about the sausages, or even …
Which reminds me, Ann, that it might be an appropriately empathic gesture to our Teutonic near neighbours, at this difficult time, to offer a reprise of that stirring ditty “Alles hat ein Ende nur die Wurst hat zwei…” as a gesture of sympathy and consolation following their 2-0 defeat in the Coupe du Monde. But I can’t find it in the archives, maybe a Team member can supply an appropriate (sausage) link…