I have been onto Virgin for about the 10th time today seems like there are a few people getting packet loss. I have had an engineer out and everything was fine (he adjusted my power levels but nothing major). Any way this changed nothing was still getting packet loss last week making online unplayable. It has started again today and a few people on here are suffering the same 15-20% packet loss. Called Virgin and they are sending out the engineer for the third time although there are many of us suffering the same issue at the same time it seems unlikely to be anything local especially seeing as I have had a replacement router checked it on 3 PC, 2 Xbox Ones and even tried the new router in Modem mode still getting packet loss. I know it wont last all day so I have posted my BQM graph to show its intermittent. I am starting to look at alternative suppliers now.
So sorry for the wireless issues you've been encountering.
To be honest there are many environmental factors to consider with regards to a wireless signal. It may be that your house has very deep internal walls, or maybe they're modern with a reflective coating. Either way this would serve to disrupt your wireless signal. My home has only 3 bedrooms but the 3rd is an extension and furthest away from my router - I have no end of problems with it and I'm with a rival ISP (though not by choice).
I should mention that there is an issue with capacity on this part of the network, ref: F004243412, for which a network upgrade is planned. We should have more information on this on 29-06-2016. But this will certainly impact on speed/performance at peak times, so it's worth you noting if the packet loss you mention occurs at any specific time of day/night.
I'd also encourage you to run both a ping test & traceroute(to bbc.co.uk will suffice) and to post the output on here. This will help us to identify if there is any packet loss on the network itself or if it's confined to the local connection.
Finally, please take a look at my PM (purple envelope icon, top right of page) which details your credit options whilst fault F004243412 is ongoing.
Many thanks, and welcome to our Community, hope you find us helpful
Traceroutes can be misleading, as the intermediate routers on each hop may decline ICMP packets thus resulting in the 'Request timed out' message. In an ideal situation the ping test will display packet loss and the traceroute would indicate where on the network the loss was occurring.
Setting up a BQM to monitor pings/packet loss is probably the best way forward with this.