DP has recently been promoted and is now expected to attend events with an overnight element. During the day he's fine in a suit, with or without a tie but is struggling in what to wear in the evenings.
The other senior men (all men) are older (mid fifties). He is mid forties but obviously wants to fit in.
He says they wear shirts with jumpers on top and he's bought a couple of jumpers but found them just too hot so needs an alternative, eg smart shirts.
He is 16'' collar and slim (32 waist). Currently only looking at next and getting frustrated. I have previously suggested Reiss based on advice here too but he needs specific items.
Any suggestions?