Registry office MOB outfit help please

[newmenewwhatever]

Size 16 (apple)
no blue. Hat or head wear.
preferably plain and not patterned.
£150 ish budget
any suggestions??

Is the bride wearing traditional or other?

dress, trousers, or jumpsuit?

Where do you like to shop and what colours do you like?

https://www.johnlewis.com/whistles-petite-satin-twist-waist-midi-dress-blue/p114232932 This is blue but nice!