Help! Please help me style this dress for an early spring wedding!

[HappyHoppy]

I'm looking for a dress to wear to a wedding in April as a guest. In Scotland, so still cold probably. Church followed by hotel. I've found this Oasis one which looks good, but yet to try it on.

www.oasis-stores.com/gb/clothing/dresses/lotus-shift-dress/060769.html?dwvar_060769_color=00&position=5&cgid=dresses#&start=5&categoryID=dresses

I'm a bit clueless about styling though - can I have some shoe/bag/extra layer suggestions please?