Internet crashing and connection dropping.

Posted this on Volt accidentally will repost this here.

Hello, a few months ago we upgraded our wifi to Virgin Media's 1.1gbps internet, everything was running smoothly until recently where we've noticed that the internet keeps crashing/dropping connection. Whilst this has only occurred a couple of times for me on my ethernet, mobile devices seem to be having a lot of trouble, I also noticed some errors in the network logs aswell as some potentially abnormal readings on the upstream/downstream channels, if there are any tech experts out there I'd appreciate some advice on what this issue might be.