help for wedding suits pls

[mumsobusy]

We have a wedding in the summer in a hot country posh doo. I have DS18 and DS4 any advice.
I saw suit in next for 4 year old which was 3 piece waist coat, shirt and shorts (sorry dont know how to link) dont know if it will be appropiate any other advice

But have no idea for 18 year old
any advice pls

I think the 18 yr old would be best in a pale linen suit with a linen shirt and a nice tie, then a linen shirt and long linen shorts (plus leather sandals) for the 4 yr old. Ebay is great for those sort of outfits

thanks I ll take a loook

where can i look for 18 year which shops

My 17 year old buys a lot of clothes from ASOS.