Thanks everyonescottish smiley and lina - I'll try a next order & pop along to mothercare too as I must confess, I'd even skipped straight to buying a pair of men's pj bottoms from George at Asda. A flattering 39 - 41" waist but they feel so good to wear 
Seeing the indentations from socks / leggings is not good but apparently but the end of the day, there's another 200ml blood around each ankle! Hence my poor legs wanting to avoid the skinniest of jeans!!!
I think I'm going to need to open my mind to internet shopping though as haven't really had any luck on the High St in looking for nursing bras. The Emma Jane range seems traditional but not bad and available on asos / amazon as well as in jojomamabebe.
Smiley I don't know much re FH but thought it was more a guide than anything else!! See what your midwife says. Have you another appointment soon to be remeasured? X