Brussels Airlines are ending their lease contract with bmi Regional (they did the same with Flybe earlier this year). All thin routes are to be operated by Cityjet's SJ100, which has twice the capacity of an ERJ145. The only viable option was to scrap the route and codeshare with BM, unless they wanted to operate the route at a loss using the SJ100. SN have done the same with Nuremberg, which was also an SN destination operated by BM. It is also worth noting that both NCL and EMA are already operated by BM, with SN codesharing on the flights.