Completely plausible that DAA could purchase BHD if it was for sale. However, the same challenges apply to our great little local airport, including cap on seats, curfew, short runway etc. Has to be said despite these challenges the airport punches way above its weight and I find it an absolute pleasure to use.
DAA would bring valuable support to the table and given a competitor up the road at BFS, there is no chance that purchasing BHD would be a move to neutralise a competitor...