Re: Plug cable entry angle
That style of connector is only available for non-earthed applications, and seems common on phone chargers.
The "earth" pin is a plastic moulding; having a metal pin for electrical protection would require quite a bit of engineering. It would need to be able to guarantee electrical contact full-time, or disconnect the live pin in case of failure.
What amazes me is that virtually every UK 13A plug is shipped with a hard plastic "condom" over the pins. The pins need no protection because the plug is very robust. They are never live when unplugged from a mains socket. The only possible reason is when the paintwork on white goods might be scratched by a loose plug when in transit. Why did the cable for your last purchase of computer equipment have one when it was also inside a plastic bag?