Oleg, loving the shots!
I have one gripe though, and maybe it is something we should take to PM's?
I am an avid collector of RAF flying clothing/equipment (especially the Battle of Britain period) and I have noticed some inaccuracies with the pilot you have shown.
Firstly, the irvin didn't have pockets, and for a correct Battle of Britain period portrayal the irvin should hve a 2-panel back. Looking at my irvin, there aren't those big seems on the arms as you have shown. For what, I think, you ca do with the engine: the b-type-flying helmet looks fine. Some colour tuning around the leather-ear-domes may be in need, but otherwise it is fine.
The SD trousers are fine, and so are the 1936 pattern boots. If you need any pictures of kit, let me know. I can give you a complete list of the different types of kit they wore, and I may be able to show you pictures of them wearing it.
Edit: BTW, the colour of the wool on the irvin is wrong as well, it should be a nice tan colour. Again I should point out that whatever model you are working from is sightly inaccurate. I could point out as well that there is a reproduction Irvin Jacket that looks like the one you have modelled here, and it is incorrect. If this is the case, then it is not your fault!
Let me know, I hope you read this