It would not be statutory rape as 16 is the age of consent. Corruption of minors is theoretically possible. Assuming there is no sort of institutional relationship (teacher/student, coach/player, etc.), it is pretty unlikely.

Is it bad for a 16 year old to date a 24 year old?

Date yes. Anything remotely sexual and the answer is no. While you are 16 or 17 if he is age 24 or more, then he can go to prison for a very long time. I would advise waiting until you turn 18.

Can a 16 year old date a 24 year old in the UK?

The age of consent in the UK is 16. This means that its against the law for someone to have sex with someone under the age of 16. It wouldnt be illegal for someone whos 16 to have a relationship with someone who is 30 - unless that person is their teacher or in a position of authority.