Andy wrote:
By the way, I tried that sawdust and pva business, what I ended up with did
not match the boards, it looked like dark shiny goo, and it shrank as it
dried.
I recommend you bin the idea and use either a wood colour acrylic frame
sealant, or, Wickes now stocks floorboard gap sealant in a range of three
colours, light, medium and dark.

Andy, I'm not actually using PVA glue but a product specifically for
this job which the hire shop reccommend.

In response to the previous comment I am using a belt sander along with
a an edging sander.