Dan Air have published a revised schedule, including their routes between Gatwick and Brasov / Bucharest
https://danair.ro/press-release
Flights will operate Bucharest - Brasov - Gatwick - Brasov - Bucharest 1x per week on Fridays. There will be no other flights to/from the UK.
Ryanair fly Bucharest - Stansted nonstop 24x weekly
Wizzair fly Bucharest - Luton nonstop 26x weekly and Bucharest - Gatwick nonstop 7x weekly
British Airways fly Bucharest - Heathrow nonstop 14x weekly
Tarom fly Bucharest - Heathrow nonstop 7x weekly
Wizzair will fly Brasov - Luton nonstop 3x weekly from August.
I'm left wondering how Dan Air will compete against Ryanair and Wizzair