As per Aero Routes, Blue Air will continue to serve LTN upon service resumption, with 8 weekly flights to Bacau and 3 weekly to Iasi, although these may both be subject to additional changes. What is surprising is that 0B will continue to serve OTP from LHR, with a 2 weekly frequency. At the moment, it is unclear what a/c will be operating these flights, presumably a mix of 735s and 738s; has the 737 Max now officially left the fleet?
Sources:
https://www.aeroroutes.com/eng/220919-0boct22
https://www.aeroroutes.com/eng/220918-0bnw22