All airports keep their own Statistics....As far as I know they have not been labelled secret or sensitive.
Quote from the CAA bird strike section about the data supplied....
Birdstrike Data
The CAA's view is that the volume of birdstrikes reported at a particular airport or aerodrome does not imply greater hazard. Due to the limitations of unanalysed raw data, users should exercise extreme caution in forming any conclusion or opinion based on quantitive data alone.
The identity of the birdstrike data reported, the type of bird and aircraft involved, and the aircraft operator, are not available.
The CAA disclaims all responsibility for any interpretation which might be made by others in receipt of this birdstrike data.
In what capacity do you require the specific data for BHD?? I would like to know before I see if I can offer further assistance.