Yep - I'm pretty sure the first weekend of March is a defo. It is it's traditional date, and I know Julian can't do the weekend after, and I can't do the 19th March or the last weekend of Feb, so it's got to be either the first or last weekend of March. I think the last weekend of March is too late, so hence my conclusion that the only logical date is Friday 4th and Saturday 5th March. If no-one posts any strong objections then an official thread will go up in two weeks confirming those dates. I have already got approval for that weekend from all those present at BedTec, so I think we can call it definite.
