Aussie
BA pilots basic pay was not type dependent in the Concorde days, just related to pay point and thus years in company. As a big part of total pay was made up by allowances, the Concorde guys tended to be paid less than their 747 brothers as single nights in JFK didn't match 11 day tours to BKK/SYD.
To make up some of the difference a small premium (called development pay) was added to keep the poor ones above the breadline!