How lovely Snapespeare :)
Loving the separates plan Frankie. I too have two bf weddings this summer (just me bfing, obvs...they're not themed...) and I LOVE the Chelsea trousers, although I think I'd prefer them without turn-ups.
I have a lovely little cream H&M jacket that I'd like to wear, but am a bit sick of the rest of my wedding wardrobe - Damsel in a Dress, Coast, Jesire, Monsoon etc - it all feels v dated. Skint though so feeling guilty about buying owt new.
IME, the most stylish people at weddings are usually wearing jackets (not cardies/shrugs/wraps), fitted shift dresses on the knee or longer (not flared skirts, minis, spaghetti straps or strapless), one statement piece of jewellery (not matching necklace, earrings and bracelet), peeptoes, slim wedges or courts/pumps (not strappy high sandals or kitten heels) and not-entirely-matching accessories (i.e. shoes, bag and headpiece not all in the same colour).
Having said that, I've seen people defy all these completely arbitrary rules I've just made up and look amazing.