OAP / Under 16 ticket - are they the same ?

My 10 year old lad cant go today , so was thinking of giving his ticket to his 80 year old Nanna. Am I right i thinking that the ticket is the same - ie a concessionary ticket ?

Anyone know ?

I think they come up the same when you go through the turnstile

Try it worse can happen is make you pay difference if any? But sure light is same for both it's more for adults using concessions when don't look 60 or under 16!