Fellow BTO Garden Birdwatchers will no doubt already know this, but I thought it might be good to flag up for anyone who's interested, that The BTO are currently running a Great Spotted Woodpecker survey - so, if like me, you are lucky enough to have GSWs visiting your garden - they'd love to hear from you!
http://www.bto.org/gbw/GRSWO/index.htm
Cheers,
Willow