I can't see Tirana being sustainable. 5x daily seems to start around mid-December looking at their website (including on Christmas Day!). Departure times vary a little day on day, but are generally from Luton at around 07.45, 09.00, 15.40, 18.25 and 18.50. Note the last 2 departures within 25 minutes of each other. Exiting 3 rotations from Wizz UK aircraft remain and are supplemented by 2 rotations from aircraft based in Tirana.