Maybe it was funny because you had ID. However we were all ready to go after this but had to waste an hour to then not even show it. Dont see the point in making us waste our time really
Maybe if you acted your age and didn't kick up a fuss about it then maybe they would've thought twice about it. Surprised you didn't get thrown out for being a ***.

Next time you'll know to take your ID.

(I'm 22
)
I did the same if i wasn't sure about someone's age. There have been many times when i have checked their ID and they turn out to be younger than me but look much older. It is difficult to take a gamble and if in doubt, there is no harm in checking. I was speaking to someone at M&S and he was saying he would now get a criminal record if he sold the alcohol as well as a £1000 fine. Some people just don't want to take a chance, so they ask to keep their jobs intact.