The only thing that seems to remain of bhh is the 'helicopter days' voucher selling business.
Are you sure, their web site (
http://www.helicopterdays.co.uk/about-us/index.asp) says:
We're not an agency that takes your money and then books the day with another helicopter company. We take the booking, we provide the pilots, we utilize our own fleet and we do the flying.
Is there still Schweizer based training going on at Biggin Hill Airport?