As regards The Times' style-guide, one has to remember that it exists to let people WRITING FOR the Times know what the editors of that publication expect. Whilst it may be helpful in many ways, it is NOT a proscriptive edict for anyone else.
If I was writing a script for Rio Ferdinand and his team-mates, I would certainly feel perfectly free to have them say, "Innit?" or "different to" or anything else they might be prone to saying.
What is "correct" is what fits the context. This is not France; we have no Academy to tell us what to write and, even if we had, I'm sure we'd do with their 'orders' exactly what the French do with theirs!