I have around £900-1000 at my disposal to choose and buy a laptop that would fit my needs. As well as the games I've listed (the newest of which I'm not expecting to be able to play on ultra/high settings) I'd also like the laptop to be able to handle some software development and Games Development (Android Studio, Unity 3D, Blender etc). Can anyone point me in the right direction of such a machine (prefer the likes of amazon, currys, etc) and convince me to purchase it for Christmas! I haven't got long left to choose and it would really help if you guys could give me a hand since I'm not the best at searching for the best specs and what not. Thanks guys!
Note: Please don't try and convince me to buy a desktop as I have nowhere to put it and prefer laptops.
There are lots to choose from, Skyast. I can throw some names and series' your way, but you'll have to decide on the specs and aesthetics. For the type of games/work you mentioned, I'd recommend getting something at least with either an i5 or an i7, and either a 960M, 965M, 970M, or 980M graphics chip.
Brands: Asus, MSI, Clevo, Gigabyte, or possibly Lenovo.
Asus: RoG series (specifically the GL552, GL752, or G752 models).
MSI: GE62 or GE72 models.
Clevo: N155RD, N177RD, P650RE, or P670RE.
I'm not as acquainted with the other brands, but hopefully that's a start.
Yes, either laptop will be able to run The Witcher 3 at medium to medium-high settings, and GTA V at high settings. WoW I'm not sure of specifically, but I believe it's less demanding than the other two games; it should run at at least high settings.
With what you said about the previous models, would you advise me not to get this laptop which comes at a lower price (still MSI build) ?
That depends on which configuration you're asking about (there are several listed in a drop down menu there). The key differences between the GE72 and GE62 are the weight and size; the GE72 has a bigger screen, is larger, and weighs slightly more. Other than that you're comparing the same things.