Right chaps, I'm think now of going down the refurbishment route as the tyre actually looks fine and the "damage" is very superficial.
That will cost me £160.00 from Lepson's (including courier delivery to them and back). They state that the repairs are normally undertaken in approximately 3-4 Working days.
Now the question is what to run on the car whilst the wheel is in. I don't want to be running a space saver for a week, so option B (and this is what I'd like advice on please), is that I have the below "spare" wheel assembly that came off my MK5 Golf (see image below of it in the boot of my MK5 back in 2009). It's a steelie, but fitted with a decent Dunlop SP Sport Tyre at a size of 205/55/16. It's been sitting for a number of years since the MK5 was sold (since March 2011 to be precise, in my garage away from direct sunlight), but the question is would that be a better option for a week or so rather than the space saver and will it fit OK to the back of a MK7 GTI ?
The tyre looks OK (just a bit dirty and cobwebby from sitting around, but there's no cracks etc. in the sidewalls and the tyre was brand new and had one ever seen the road once (when I had a puncture in the MK5 for around 10 miles).