The Cornish Mill and Bakehouse (not white), Wessex, Carrs, Bacheldre, Shipton Mill, Buywholefoodsonline unbranded (which I believe is Shipton), Matthews, Dove's, (Allinson's, Tesco's, Morrison's) ... that I recall. Some weren't white flours, but I tend now to bake only white (sometimes with a small% of rye or wholemeal) as I prefer lighter breads. I liked Matthew's Cotswold Crunch, but it seemed to have got heavier - maybe the proportion of barley was increased.
Shipton? Interesting. I found it well down my list of choices.