Talking Horse is right, except you'll get a credit for fixed wing Operational Procedures if you've done it in the last 3 years. All our current heli courses follow the 'interim procedure', where heli pilots do predominantly fixed wing exams, so, if you've done the course with us, you get this exemption.
Thus, if you've done the military bridging course for helicopter pilots and you want to cross over to ATPL(A), you need to do exams in Principles of Flight (A), Performance (A) and (another) bridging exam comprised of sections of AGK, Instruments, Met and Flight Planning.
If you've completed all the ATPL(H) subjects using the interim procedure you just need to do Principles of Flight (A) and Performance (A).
A small warning, here. The interim procedure is due to be withdrawn at the end of November and, from that date, anyone starting a helicopter military bridging or full ATPL(H) course must follow a helicopter specific syllabus. For a number of reasons we are unlikely to be able to offer these courses between 01 Dec 08 and April 09. It won't affect either of the above posters, though, they can carry on what they are doing, it only affects new starts.