The Met Office has announced their intentions to bump 2010 up to #1. (I can’t imagine which US agency might have pressured them to do that.) But their challenge is more difficult than just pushing 1998 down. The also have a 2005 problem, as it appears that 2010 will also be cooler than 2005 – because temperatures have plummeted across the globe this month.
They will need a different 2005 strategy.
It is worth remembering that in 2000, GISS pushed 1998 up and 1934 down, to make 1998 the hottest year in the US.
Now, 1998 needs to go back down to make 2010 warmer. Juggling 1934, 1998, 2005 and 2010 is like keeping four balls in the air at the same time.