Now one interesting aspect is that every carrier is likely to have to base an aircraft in DND, because that's where the early-morning demand originates. (I haven't seen the tender so don't know if this is explicitly stated)
The schedule requirements are:
Monday to Friday, first arrival into London no later than 0830.
Monday to Friday, last departure from London to be no earlier than 1800.
Monday to Friday, first arrival into Dundee no later than 1100.
Sunday, departure from London to be no earlier than 1800