I booked a WT fare on ba.com earlier today. I was hoping to upgrade. I went to MMB and under Change booking I can't see:

* Upgrade my class of travel with money; or
* Upgrade my class of travel with miles

However, I can see:

* Change date/time of my flight
* Cancel/refund my flight

I suspect I've dropped another clanger...

What have I done wrong?

Palmer