IIJM, or is this getting increasingly hard to source? Strong bread flour is everywhere, and a few years back, plain wholemeal was also commonplace. But now, Tesco don't have it, Asda don't have it... I tried searching my locality, and apparently Sainsburys have it. I don't like Sainos much, and it's over the other side of town, so I never go in there, but might have a look tomorrow.