EasyJet said its problems in reaching an acceptable level of profitability in Dortmund had been exacerbated by the early 10pm night-time curfew on operations, which had eroded its competitiveness.
Just to stay with the facts and as info for those who do not know DTM so well: The 10pm curfew was always there, already when EZY chose DTM as a base and it was never implied or even seemd likely that this curfew would be changed to 11pm or even later.
The 10pm curfew is normal on most German airports but usually these other airports have exceptions such as "Home Base carriers may land scheduled until 11pm and delayed until midnight" or similar.