Help please! Urgent guest wedding outfit advice needed!

[Mindgone]

City centre (not London) wedding noon today. Had planned on wearing a long, navy evening style dress, but found out late last night that the small group I’m attending with are mostly wearing short summery dresses. Should I wear a more summery day dress, or stick to the long navy one?? 😩
Thanks so much in advance for any help, DH no help at all 🙄

@Mindgone So, what did you wear and how did it go? :)

Navy one is so much nicer! We need a photo of you in it though!

Go navy, it's gorgeous. Have a great time!

Ooh the navy is gorgeous.

Thanks so much everyone! 😊 I wore the navy dress, held my head high and smiled lots! Got lots of compliments from my friends, and a lady in the ladies’ said she’d been admiring it too!
In case anyone’s interested, it’s by Monsoon, and I bought it from the John Lewis website.