New Laptop!

Hey guys!

So, it's that time where I have to purchase a new laptop. This one I'm using at the moment is on the brink of death and I can't use it any longer (It's 5 years old). So I was wondering, can you guys help me?

A bit of info, I'm a student. Studying GCSE's at the moment, and I'm being overwhelmed with projects and essays as "I have the capability" to do everything 1 year early. Therefore, I need something quite powerful. I also do a bit of coding and I play a few games on my Laptop.

I'm looking for anything underneath £700 and it has to be quite light and quite skinny as I do travel around a lot.