In one world, Cossack heard about Albert Bridge and looked the other way. In another, John Rider found a stray assassin on his doorstep. An AU told in snapshots for the Alex Rider Big Bang. Updates irregularly as real life allows.
MI6 never had a good track record when it came to Alex Rider. When his most recent mission goes predictably off the rails, it takes ten days without contact before anyone in London reacts. In retrospect, MI6 should probably have looked a little sooner. Or: Alex becomes an accidental supervillain. Mostly fluff by Alex Rider standards.