Our Wooden Boat Centre is running courses in oar making, skin on frame kayak building, and skin on frame Whitehall building.  See http://www.woodenboatcentre.com/wbf .  We particularly like the Whitehall - a dinghy almost the size of Grebe that weighs 27kg.  And the even better news is that whilst you need to book now there is time to save up!