I find the clothing thing very hard to decide.
I too fly from an RAF club, and many of the members, older and wiser than I, always fly in a Nomex suit. I did, for a while, particularly flying our Firefly which had nowhere to put anything. But it leaves me feeling a bit of a fraud, really. Recently I flew my IMCR renewal in a t shirt alongside an examiner in a flying suit and gloves. He didn't say a word! (nor indeed fail me)
On the whole, I am with A and C, and wear long sleeves and trousers in natural fabrics, usually cotton. I don't carry gloves but I have a pair and perhaps I'll start. But I must admit last week in 30° temperatures I flew in shorts and a t shirt, on the basis that the distraction of being boiled alive would probably be a worse risk.
Tim