Slight problem, I have been recently building in UE4 but have came across a problem. As you can see below, I have assigned a texture of metal to my wall. However when I get far away the texture starts flickering, making it look terrible!
I have a few values attached to the texture such as:
Metallic
Roughness
Can someone please tell me how to fix this, any help will be great, thanks 
What you are seeing is quite normal and it even occurs in real life depending on repeating pattern of a surface so you need to break the pattern a bit somehow if you want to get rid of it. It may also occur with unexpected textures if the texture’s resolution isn’t power of two(512x512, 512x1024, etc.) when the texture doesnt have mipmaps and creates noise as distance increases so keep that in mind as well.
The term is “moire effect”. Depending on how the walls are made, there may be different ways of dealing with it. Look here for a similar case: Moire Problems - Asset Creation - Unreal Engine Forums
