I have lost two stones over the past year due to illness and realised that my bras were far too big. Having read threads on here about sizing and how to fit bras, I went into M and S yesterday, tried on about 30 and bought four new ones. Am totally chuffed to bits as I think that I have got the best fitting ones I have ever had in my life. Have gone from a 36C to a 32D.
Even accounting for the weight loss, the old ones never fitted properly. Now I know why.
Thanks MNetters!