I honestly don't think you can find a laptop that powerful for that price range, but I found a laptop I personally think is decent.
- Acer Aspire E5 474G 79H1
It is currently on sale here at the price of around £499 and for that, you get a Core i7-6500U and 8GB of RAM. At a retail price of £599, you even get a Nvidia GeForce GT940M, nothing great, but better than Intel GPUs.