Thanks, Cornykev, I missed that thread, but it sounds like a great idea. Just got to convince the kids that our reluctance to give them copious quantities of 'fizz' was misplaced, and that it's now OK - to protect Dad's sweetcorn crop! Alternatively, I may have to turn to copious quanties of cheap cider instead. Mmmmmm........tough choice. Still, a year to go before I need them so, lead me to it!