[Ignitionnet]

So you don't actually have slow downloads generally and most sites are fine but are seeing slow speeds from a single speedtest and called Virgin to ask about it?

Virgin cannot give you your contention ratio as it varies from area to area and they make no promise on what it is.

Throttling is per user.

Broadbandchoices speed tester is rubbish, nothing anyone can do about it, it's rubbish.

if your connection is running slow generally call Virgin, but if just one site is giving issues then it would seem logical that the issue likes with that one site.