Cloudboy,
Either get the twelve hours in before it expires (including one with an instructor), or you'll have to do a LPC (I think thats the correct set of letters) with an examiner. Its not quite the full skills test, but I'm not exactly sure what it enatails as I've never had to do one. Somebody like BEagle or Bose-X will be along to tell you.
The time you've flown inthe first twelve months of the two year period doesn't count for anyting.
You can't just send in the form to the CAA.
Brooklands