My husband got visa for UK as a EU family member but I am already in UK. Could he enter UK while I will wait for him at UK airport ?
EU freedom of movement also entails having the right to join one's spouse in another EU country so since you are already in the UK, the family permit definitely covers this situation, even if you do not cross the border together. The official website reflects this:
The EEA citizen you’re joining must either:
- be in the UK already
- be travelling with you to the UK within 6 months of the date of your application
Things would be different if your husband went to the UK before you or wanted to visit the country alone but that's not the case here. Because of this, knowing your address and contact details (to be able to show you are a resident) might be useful (although I have no idea whether and how often people are actually challenged about this in practice).