Youtube home screen unreadable

Since yesterday I've had issues trying to use YouTube from my virgin box. Initially, it wouldn't load and sat with a black screen. I left it, however when I went back later youtube loaded fine but the home screen is ridiculously large. Like I have increased font size or display size. I haven't, other tv and apps are fine sizewise. If I randomly push ok on the remote, the video on youtube plays fine in the correct size etc. If its stopped to go back to the home screen, the home screen is unreadable again with icons and fonts etc being too big and overlapping and ghosting. I have tried rebooting a couple of times, but it hasn't resolved. I'd understand better if the videos were huge too and unwatchable but this seems to be a glitch when you first go into youtube. If anyone knows how to fix this I'd be grateful! Photo below!