Missing Shirt & Socks

Good afternoon people! Just wanting a lil advice on what to wear with attached items. I will be attending an after wedding reception tomorrow and I have left it very late to choose something to wear. If the attached photo is a poor choice in general I can mix it all up. I live in the UK. I haven't been advised on any sort of theme/colour scheme either so felt a neutral choice was the way to go. Cheers in advance!