The one plus one

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Across
  1. 1. A GP is a medical doctor. The P stands for "practitioner", but what does the G stand for?
  2. 4. The British health ministry: NHS. National Health -
  3. 6. The R in RAF, which is the British Air Force.
  4. 7. The GCSE is a General certificate of - education
  5. 8. The P in RIP
Down
  1. 2. The school subject of sports is PE, physical -
  2. 3. An MP is a memeber of -
  3. 5. When you say something with just the initial letters of each word