[colinsunderland]

ok, tried changing the MAC and didn't make a difference (or change IP)

using http://www.blacklistalert.org/ I get the following result
not sure if it means anything

Reverse DNS (PTR) exists and claims to be: cpc2-sund8-0-0-cust766.know.cable.virginmedia.com.

Forward DNS for cpc2-sund8-0-0-cust766.know.cable.virginmedia.com is: 213.106.xx.xxx

WARNING: Forward-DNS does NOT match Reverse-DNS.
DNS is INCONSISTENT.
Please request your Admin or Provider to fix this.

tracert shows the following

Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation. All rights reserved.

C:\Windows\system32>cd..

C:\Windows>cd..

C:\>tracert www.halifax.co.uk

Tracing route to www.halifax.co.uk [212.140.245.97]
over a maximum of 30 hops:

1 190 ms 168 ms 171 ms 10.37.68.1
2 113 ms 123 ms 128 ms midd-cam-1b-v135.network.virginmedia.net [213.10
6.239.101]
3 259 ms 216 ms 189 ms midd-core-1b-ae1-0.network.virginmedia.net [195.
182.176.113]
4 190 ms 214 ms 418 ms manc-bb-1b-as6-0.network.virginmedia.net [213.10
5.75.49]
5 158 ms 111 ms 135 ms popl-bb-1a-as4-0.network.virginmedia.net [212.43
.162.85]
6 195 ms 197 ms 219 ms popl-bb-1b-ae0-0.network.virginmedia.net [213.10
5.174.230]
7 169 ms 174 ms 207 ms tele-ic-2-as0-0.network.virginmedia.net [62.253.
184.6]
8 251 ms 175 ms 177 ms 195.99.125.113
9 162 ms 192 ms 228 ms core2-pos0-6-4-0.ealing.ukcore.bt.net [195.99.12
5.194]
10 252 ms 255 ms 210 ms core2-pos7-0.sheffield.ukcore.bt.net [62.172.103
.114]
11 283 ms 258 ms 280 ms 217.32.171.118
12 206 ms 176 ms 165 ms 213.121.143.190
13 62.172.161.126 reports: Destination net unreachable.

Trace complete.