Need advice on budget build need help!!!

[nixonphilip]

I have a budget of £800 can go to £850.
I have a monitor, OS and mouse need and want a wireless mouse.
I have tried a number of different types of builds that i want or fit around my budget but need help thanks a lot appreciate any help.

 

[nixonphilip]

I am going to use it for like 50% gaming and the rest for like office applications and photoshop and basic things like the internet