OK, eventually Virgin passed this issue onto BT to investigate.
Now Virgin have come back to me with what BT have told them...
BT say that the line is limited to a fixed 576 k -- that much we knew -- but they also say that they cannot do anything to increase the speed! When I questioned why (of Virgin, not BT), the tech guy said that it must be something to do with distance from exchange, line quality, or something along those lines. He was basically saying there was zip I could do about it, and it would require BT to get around eventually to upgrading all the lines in my area.
Thing is, the BT speed checker itself says that my line is capable of up to 8 meg:
Broadband checker results
For Telephone Number xxxx on Exchange yyy
We've just tested your line and can confirm your line supports the UK's most complete broadband package, BT Total Broadband. We estimate your maximum download connection to be up to 8.0 Mbps (Megabits per second).
So, what gives? Is someone spinning me a yarn? I said that it was my understanding that, although I might not be able to get the full 8 meg, with a properly configured but poor line I should be able to get more than 500k, and shouldn't be connecting at a *maximum* and *fixed* speed of 576k. If my line was absolutely rubbish, perhaps I'd be getting even less than 576k, but at least it would be trying.
Virgin's answer was that BT must have determined that to give me a *stable* connection I have to be limited to 576k. To try for more, I'd end up with an unstable connection.
Now, where I go next? Sounds like a complete load of balderdash to me.
Thanks,
Mike