...at a country estate owned by DH's boss please!
I somehow think that my version of smart casual (skinnies and a nice top) will not cut the mustard here! Want to look nice as it's an important day for DH wouldn't have been so fussed if it was just for me
Am anywhere between a size 6-10, am 5'2 so quite petite, and have recently suffered a miscarriage so am feeling quite self conscious 
Thanks for all advice in advance, I've been following the frumpy dress thread in awe of your suggestions! 