So what we're basically concluding is that British military uniform is anything but uniform.
You only have to look at the photo of HRH to see the full spectrum. HRH's shirt collar is a traditional pointed affair whilst the chap behind is sporting some Apprentice-esque spread collar that wouldn't be out of place in Leadenhall Market once the trading desks were closed. There's even a Navy chap in a skirt and heels behind them. In fact I think the only place I have seen standardised uniform is in McDonalds. And they get more medals there too