M & S recently introduced Seeded Rye Sourdough, which has become a firm favourite. On return visits it hasn't been on display - either sold out or the day's delivery hasn't arrived. My nearest M & S food store, Berkhamsted, is a 14-mile round trip and I need to know it's available to make the visit worthwhile! If I ever see it again I'll buy a few loaves and slice and freeze them. A friend bought some from another M & S and it was - classic sourdough mistake - full of air holes. Expensive air holes at £4 a loaf. It's a shame that something as simple as a good loaf of bread isn't reliably available in store. It's the deal-breaker in my decision to shop at M & S, or nearby competitor Waitrose.