Ok, if he was definitely in the RAF your best bet will be to apply for his service record. See this link http://www.veterans-uk.info/service_records/raf.html for how to apply.
His record will give you all his postings, promotions, Squadrons he served with etc. You will need to supply as much information as possible because you do not have his service number but I am sure they will find his record. I believe the service costs around £30 and takes several weeks.
Once you receive his record of service you may need some help deciphering the acronyms so just post on here and I will see what I can do.
