on 08-11-2019 07:53
You can change the email by going to your MyO2 http://www.o2.co.uk/myo2 and going to "Manage my details"
To change a name due to marriage, see help here O2 surname change
The reasons stated on the link are the only allowable reasons for a name change.
Any other reason would need a new contract to be taken.
OnePlus 6 (O2 & Sfr), Z3 Tablet (Three UK), iPhone 8+ (EE)