I had a look at these pens on Amazon just now, and as the PP above said, they do not look very good. Look more like frustration causing gadgets to me.
I am not a teacher, and I know nowt about modern GCSEs, but I did just look up the course, and it looks pretty good. Very comprehensive.
I am a Design Engineer by trade, and I reckon the best gift for that course would be an A3 drawing board. Put a bit of the old " back to basics" in, sort of thing.
The best is the Rotring A3 board. It's pricy at about 75 quid, but there are loads of generic copies for about 30 quid that are just as good. I will put an amazon link below, see if that works.
I would add in some technical pencils, 0.3mm, 0.5mm and 0.5mm. Again, Rotring are the best, but there are plenty cheap as chips alternatives. Try to get ones with lead harness indicators on, because most designers likes a selection for different line types. A set of set squares, compass set, stencils, if you really want to splurge. Put in some pads of A3 paper too. Plain, tracing, gridded, isometric grid.
I had my trusty old Rotring board by the side of my desk for 30 odd years, and even when using state of the art CAD systems, that board still got pulled out for doing initial concept sketches. I was pretty upset when it went missing during a move.
It's the sort of thing that even in put away in a cupboard will always end up being used again if your DS does anything technical. The basic drawing board will never go out of date.
rOtring Profil Drawing Board | A3 Size Drawing Table | with Adjustable Ruler/Guidelines : Amazon.co.uk: Home & Kitchen