OK, been back to checkmytrip and looked at the e-ticket numbers
It says;
Only e-ticket numbers are displayed when they are issued
Document XXX-XXXXXXXXXX
Document XXX-XXXXXXXXXX
Document XXX-XXXXXXXXXX
I've left off the numbers, but these are the ticket numbers for the flights that have been issued. At the bottom it does say under flight payment - not available.
Therefore, I've definitely been given ticket numbers for each flight