Dress for 6 months pregnant wedding guest - multiway?

[susannahscoffs]

I'm going to a wedding in early summer when, if all goes well, I'll be nearly 6 months pregnant (but probably looking much larger if my past pregnancy is anything to go by!).
It's an evening party in a hipster-ish converted warehouse in London.
I don't want to wait until the last minute as there aren't many good shopping options where I am (outside the UK), so was beginning to think about possibilities from online shops and remembered seeing those multi-way dresses somewhere on a shopping trip in London...

Would these dresses be suitable as maternity wear?

I'd rather not buy an actual maternity dress as I'd like something I can wear again in the future.

I've found a site called Willow and Pearl, wondered if there's anything around that's a little easier on the wallet but still good quality? Or some better options altogether?

Yes, definitely suitable. A friend of mine wore one to a wedding when she was pregnant a couple of years ago. Looked lovely. Bhs and Debenhams do them online.

Or take a look at ASOS, especially their sale. They have some good maternity stuff that could be worn either side too

Multiway dresses are new to me - how would they accommodate a large bump? Maybe I don't get how they work (seems to be all about twisting the straps / sleeves / bodice, from a bit of Googling)

Thanks for the tips. Asos have some options worth considering. Bit concerned the multiways might be too clingy over other lumps and bumps!