I'd say put some money away for a light, portable laptop with some processing power. It's likely not necessary but it adds an extra level of convenience for doing e.g. matlab, CAD, CFD, FEA at home, or when there's no computers free at uni.
Or alternatively don't spend £1000 on a desktop, the gaming laptop market is pretty great right now and so you'll be able to get a laptop with similar performance to that desktop likely for significantly less than the price of that desktop plus a laptop. You can get something in the 1050 Ti to 1070 range for £900-1500, the lower end of that will handle 1080p games fine at max settings for the next couple of years, the top end will handle 4K max settings for a similar amount of time.