Looking at the way that Qantas are doing things with the A380 could give a pointer to the way ahead. It seems that they are establishing a separate A380 fleet on different terms and conditions (no Long Range Payments?).
Think how that might transfer across to the BA world at LHR.
The Shorthaul arena will shortly become an A320 family domain. Add the A380 and/or B787 to that on revised T&C and suddenly you undermine the Longhaul Long Range bonanza.
There will also shortly be the results from the Inland Revenue allowances review - I confidently expect that the tax rates will rise upwards to about 60-70%. That will get BASSA back to the table to discuss TAFB allowances at a lower tax rate, and facilitate other changes in the agreements, imho (before we get into the changes demanded by the current economic climate).
Imho monumental changes are about to be tabled within the next month. Watch this space.