https://www.manchestereveningnews.co.uk/news/greater-manchester-news/get-fing-bus-dad-says-16224493
The IGO travel pass costs £10, so the dad is right saying it's nothing more than a money-making scam.
The bus driver is technically right, he's complying with the GM scam which ensures that visiting over-11s have to pay full adult fare on buses as they are not eligible for an igo pass. However, if you use the tram a passport is perfectly OK as proof of age! Tough on the bus if you have teenagers, so take granny to Manchester instead and she can travel all day for free, as long as she doesn't venture on Metrolink, of course!
However when researching this topic I couldn't believe this:
https://tfgm.com/tickets-and-passes/womens-concessionary-travel-scheme
Basically GM are subverting equality legislation by offering women of my age a pass for which men are not eligible!
I'm a great believer in local autonomy but GM really need sorting out, he transport confusion is a disgrace.