May also be worth Virgin users doing a trace route to your site to see where the traffic is going.
trace route seems fine too
Tracing route to michaelwinward.co.uk [195.62.28.79]
over a maximum of 30 hops:
1 12 ms 22 ms 14 ms 10.133.224.1
2 24 ms 34 ms 12 ms midd-t2cam1-b-ge94.inet.ntl.com [213.106.238.221]
3 12 ms 13 ms 10 ms midd-t3core-1b-ge-011-0.inet.ntl.com [195.182.176.117]
4 21 ms 20 ms 33 ms midd-t3core-1a-ge-100-0.inet.ntl.com [62.254.64.145]
5 12 ms 31 ms 23 ms lee-bb-a-so-130-0.inet.ntl.com [213.105.75.45]
6 39 ms 19 ms 56 ms pop-bb-b-so-100-0.inet.ntl.com [62.253.185.238]
7 16 ms 17 ms 45 ms tele-ic-2-as0-0.inet.ntl.com [62.253.184.6]
8 33 ms 39 ms 23 ms 212.250.14.114
9 41 ms 19 ms 21 ms ge-1-436.border1.core.misp.co.uk [195.72.130.246]
10 22 ms 21 ms 31 ms ge-1-377.captain.core.misp.co.uk [91.198.165.5]
11 21 ms 23 ms 32 ms kronos.servers.rbl-mer.misp.co.uk [195.62.28.79]
Trace complete.
I did these two after each other... see what i mean.
its just so annoying.