Train driver uniform of the day

This is from Modern Railways in January 1995. Not being a frequent visitor to either Gatwick or Victoria, I don't know whether this is still the Gatwick Express drivers' uniform. What is intriguing to me, and not mentioned in the caption, is that as well as his leather jacket, driver Ian is wearing tailored short trousers with long black socks. Presumably this was optional for summer wear. I wonder if it caught on? 

I think all uniforms should include a formal shorts option like this. I think UPS parcel van drivers, in the USA at least, voted to have such an option. Belgian postmen are allowed to wear shorts, but they are mostly slobs who don't wear them properly. There should be a rule about what socks go with the shorts. Thin black or coloured ankle socks of the sort that you would wear under long trousers are an absolute no-no. The long ones shown here are OK if you don't mind looking a bit like the South African police. Short thick white (e.g. tennis) socks look best.