Thanks for the replies, I'm pretty impressed with what I'm getting for my money so far!
As for the overclocking I'd like to avoid it really.
An SSD is preferred especially since I don't think I'd need a ton of memory, 240gb should be enough for me to be honest. If I need more I can upgrade at a later date.
Also for comparison could I get a build for around £600 budget? Thinking about lowering the budget a little.
If you go down to 600 then you are really going to need to sacrifice something:
1. Slower CPU
2. Slower GPU
3. A motherboard that doesn't support USB3.1 and USB-C, these ports maybe nice to have in the future, USB-C should become the new standard.
There is really not much money to be saved on the Case, PSU, RAM or SSD
SSD = 57
500GB HDD = 34
Even slow SSD's will give you a much better experience over a HDD, would you want to lose that for 23 pounds?
You could half your RAM to 8GB instead of 16GB and save 26 pounds. I personally don't do much more than browsing and gaming, but somehow I still get through the best part of 8GB of RAM, so I would go for 16GB, but you could go for 8GB now and then upgrade another 8GB later if needed.
You can save 5 or 6 pounds on a cheaper smaller case, but only if you get a MATX motherboard.
Don't compromise on the PSU, you will want between 500 to 600 watts if you are going to put a big GPU in there and its important you get a reliable one.
Now if you really needed to get down to 600 pounds then personally I would go for 8GB of RAM and go for a cheaper GPU. GPU upgrades can be easily added over the years to improve your graphics performance as a CPU like the i5-6600 should be able to cope with GPU's many years into the future.