FODplod,
I'm afraid that I couldn't give you the exact detail of day to day activity undertaken by the members of the RAF, but I would imagine that there is a wide some spectrum of activity depending on ones actual role - the RAF Careers Website does give a little detail on what each trade does -
RAF Careers home - jobs, recruitment and career opportunities in the RAF - RAF Careers
I would also suggest that preparing for operations plays a major part in the day to day life of all the services.