Hey, fairly new to UE4, i dont understand why my material is getting tiled into smaller pieces, I just want one large image as a background
Thanks
In your material: Just add a texture coordinate node - connect it with the uv from your texture sample - now in the properties of the node you can scale it up or down. 
The tiling happens because of your uv map
aha thank you, ill have a mess around with the numbers now