SQ and VS have been codesharing on each others flights through MAN since Jesus was a lad.
They used to get some interesting feed on the old nonstop 772ER flights to SIN with people who wanted to fly them but avoid the hellhole in West London, including quite a few from EI. As for it going nonstop, again, well add that to all the other rumours including being dropped, delinked with MUC and linked with CPH instead, linked with AMS, linked with BRU, going 'Scoot'....
One of them will come true at some point I'm sure.