Which outfit as a wedding guest?

[Nighthawk]

If the dress code is expressed as formal, then your PC is perfect. Otherwise, a PC may be a little over dressed. The rule is, never outshine the bride. An Argyle, nice shirt, tie, solid (not diced or tartan) hose, and if you're feeling a little daring, a waistcoat of a color different from your jacket would be a most appropriate outfit. This is, of course, assuming this is for a daytime wedding with no theme or dress code.

[ctbuchanan]

My rule of thumb is to imagine what all the other men will be wearing from the waist up and go with something similar. i.e. if they will be wearing black tie or formal, then go with the P.C. If not, then bring it down a notch.

[Tobus]

If the dress code is expressed as formal, then your PC is perfect. ... This is, of course, assuming this is for a daytime wedding with no theme or dress code.

I was under the impression that a PC is not appropriate for a daytime wedding? Or any wedding, for that matter? Where's Jock Scot when we need him?

The OP's location being the UK, they will likely adhere to rules that are more traditional and "proper" than we observe in the USA. I would stick with an Argyll jacket.