Thanks Sixth Freedom; e-ticket receipt returns the error "Sorry, an e-ticket receipt is not available for the method of payment used for this booking."

I think it's because I made a booboo when I booked the flight; I wasn't paying sufficient attention when I selected my return as "Saturday 26th" and didn't notice that the calendar had jumped forward by a month. Obviously with February being 28 days Saturday 26th is the same in Feb and March. I had to call BA to get the booking amended when I saw the post-payment summary telling me that I was due to be in China for 6 weeks instead of 2!

I'll give BAEC a call just to make sure that I've definitely got a space on the flight as shown on the MMB screen.

Cheers.