I spotted a delicious looking recipe [[http://londonbakes.com/2014/06/nectarine-blueberry-and-buckwheat-cake-gluten-free.html#more-2034 here]] but am struggling to find buckwheat flour anywhere. Asda - no chance. Big Waitrose nearby - nope. Tesco online - nada. Holland & Barratt ^surely^ - not there either. I've run out of ideas.