Recently completed an Office for National Statistics (ONS) survey I was invited to do, and was very pleased to note it asks about "sex" and not "gender". I hope this is a sign of more common sense, unlike the census discussions recently. I gave them some positive feedback on it 
On the other hand I did another survey for a company I'm a customer of recently which asked about "gender", so I challenged them on that. But I'm more bothered about the official govt. stuff, so pleased that that one got it right!