Started boarding my loft a few months ago and did about half of it. Found
that 1200mm long boards were ideal because they covered a joist in the
middle and the two ends were half way over another joist. This meant I could
have all the joints on a joist -cool.

Trouble is I can't find 1200mm anymore just 1220mm. This covers the middle
joist and the end ones totally, so I can't screw the next one down as well.

Apart from sawing 20mm off the end, any ideas ?