Billy Bob - just had a look at this :
http://www.nats-uk.ead-it.com/aip/cu...9_M_042_en.pdf
And basically the answer is NO....UNLESS as caveated several times in the text "any aircraft flying in accordance with a clearance issued by the Air Traffic Control Unit at RAF Brize Norton" Which is what you will have to get to cross the CTR anyway (RIAT or no RIAT).
Don't leave it to chance - call the Brize Supervisory prior to take off; traffic permitting I'm sure they'll try and accommodate!