Trio - NC Sudoku 2013 - 1

Trio Sudoku has always been one of the basest of Sudokus. Its like three different set of sudokus rolled into one. I was just sitting and wondering how I could make the three individual sets interact and decided to add the Non-Consecutive constraint to it. The result was quite pleasing and here is a Trio with a Twist.

Rules of classic sudoku apply. Additionally orthogonally adjacent cells cannot contain consecutive digits. Grey cells can contain only the digits 1,2 and 3. Yellow cells can contain only the digits 4,5 and 6.