Here are a couple of photos of a beautifully restored Flying Fifteen, owned by Graham Lamond of the association (British Isles Flying Fifteen Association). If the one I looked at comes my way, which I sincerely hope, this is what she may look like after a few weeks of hard labour. Notice how the top veneer is diagonal, rather than fore and aft.
The keel drawn by Uffa Fox for his design is pretty, rather than efficient, and decidedly idiosyncratic. But to hell with fluid dynamics; it works well enough, and the class thrives (albeit with a modified keel and rudder and subtle changes to hull shape). And, of course, they are all glassfibre these days. To find a wooden one with this potential for restoration is exciting.