Patti, firstly I must say "thank you for allowing me to be your first guinea pig" and secondly sorry for not getting back to you earlier with the question you asked me about the uniforms. (Bloody shutdowns at work !!!!!!!!!!!!!!)
I do believe if you can think of a uniform combination then it was probably worn through the BoB. The regs were actually quite relaxed during this time for one reason or another (moral maybe??)
Here are some uniforms. I will post links only just in case of copyright.

http://www.stby.com/Geneseo2004/Gen047.jpg
http://www.sutlers.co.uk/acatalog/World_War_2.html
http://www.rathbonemuseum.com/GB/RAF...illsonFull.jpg
http://i.telegraph.co.uk/telegraph/m...7-_649421a.jpg
http://www.iwm.org.uk/upload/package...s/HU_55431.jpg
http://www.nationalarchives.gov.uk/e...inf-3-1689.jpg
http://www.donny.co.uk/Doncaster/eca...trians/203.jpg
http://newsimg.bbc.co.uk/media/image...er_long203.jpg

I think Richard's uniform would be very close to what would have been worn when it was quite cold during the BoB. As you can see from the above links the uniforms were varied. And there would be more.
Great work on the new pilots Patti. Where do I send Money!!

Cheers,

Brad