Thanks to all for your comments. There was a couple of knots wind more or less straight down the runway. The first comments from the pilot were that it flies very nicely. A bit like an oversized Fleet 7.
I should stress that this was not at all a solo effort. I am a volunteer with the Early Birds Foundation in the Netherlands. A foundation dedicated to preserving old aeroplanes and aero engines in flying condition. Take a look here for some more info on our foundation:
http://earlybirdsmuseum.nl/en/planes