Ladies! A possible solution!
I have a whole drawer full of secret support vest tops (used to wear them before I was up the duff for yoga and stuff) and since I got pregnant I have been experimenting with pregnancy ones from Mothercare, Blooming Marvellous and longish non-maternity ones from M&S and H&M.
The non-maternity ones are now a bit short over the bump.
Anyway, have rummaged and tried things on for the last hour and the clear winner is this one, from FunMum - bought in a size larger than my pre-pregnancy size - I was a M before, and now I am an L, at least as far as the rib measurement goes (the rest of the top stretches to cover boobs and bump).
Comfy and the best news is, 50% off in the sale! Just as well, I don't think I would pay 23 quid for what is basically a vest, but 11.50 to finally be comfortable is fine. I got a black one and a white one, already had a black one, and as autumn comes I think I will live in them - one on, one off and one in the wash.
Thank God.
I think they look nice enough to wear as tops actually, am quite pleased. No more bras for me. Sigh, I did used to like matching knickers and bra sets.
Anyway, if anyone else has any further recommendations please post 'em up!