Intermittent Signal for 3 weeks

Hi everyone,

For 3 weeks my internet will keep cutting out briefly every 2-3 hours, and this is happening on devices connected via WiFi and ethernet.  Before this time it has worked great.  I am on the Volt 1 Gig package with a Hub 5 and Flex TV. 

The online test keeps saying intermittent fault in the area, and that the connection will be monitored for 24 hours - but after 24 hours I get a message saying all is fine. If I re-run the test the cycle repeats with the intermittent signal message then all is fine after 24 hours.  

I have rebooted and also reset the hub.  I was able to get an engineer booked for this Friday, but can anyone advise on this and any other steps that might help as it is interfering with my work.  Friday was the earliest I could book due to work also.  

I have attached a screenshot of my Broadband Quality Monitor from today - it is is looking like this every day:

[MOD - Image removed due to IP address]