My DH is going to the evening reception of someone he is the boss of. Doesn't know the bride or any family. At quite a posh looking place. Invited on his own. No additional expenses like staying overnight. Never been to an English wedding before so no idea how much to give ( wants to give cash rather than gift). Doesn't want to appear like a tightwad or flush either! Won't be giving to the work collection in addition. Thoughts please 🤔 thanks in advance.