well i'm not in the uk ---actually in the states (u.s.)
anyway---what i've been doing is buying the baby doll tops obviously the larger sizes and been able to get away with those for a while and almost all of them still fit now---
but what works best for me is buying minidresses and pairing them up with jeans or dress pants---they look great---actually have gotten lots of compliments on them=-=== most people cant even tell that they're dresses passed off as tops... besides --- i can still wear them after baby is born --- i try to avoid buying the super dressy ones (glittery and all that) and opt for like the casual ones that look great as tops
and as i'm only 5'4" and not as tall as most--- i aim for the shorter ones that either have a cute tie back strap or look like the baby doll tops===
well hope this helps
as for pants--- i bought all of mine used as i wasnt planning on wearing these after baby's birth so i got them from sales and stuff
but i did notice that mine all ended up being old navy pants and have found them to be quite comfortable and no they dont fall down---lol
try this link---
http://www.oldnavy.com/browse/catego...n&clink=602440