What are you looking to do on the pc? For that price I think you could get something a lot better from scan/ ebuyer. Dino pc (I think) has 25 pounds delivery charge as well. Ebuyer is free for orders over £50, and scan is free if you've been a member of this forum longer than 14 days. The power supply on that system isn't great and upgrading in the future may not be possible. Have you not seen videos on YouTube of how to build a pc, I was a bit sceptical 2 months ago abut building a system and was certain I was going to buy from dinopc but read bad reviews. There are good tutorials on YouTube like Neweggs how to build a computer which are a beginners guide on to build.
This is a bundle which would need assembling and is better than the one from dino and cheaper
https://secure.scan.co.uk/aspnet/Shop/Basket.aspx