The houses of parliament netblock is publicly listed:
Despite their unwillingness to reveal the UK parliament web proxies in an FOI request, wikipedia allows you to query for /24 blocks. 63 wikipedia queries later, and here's the list of every IP address that has made a wikipedia edit from the UK parliament netblock.
| *.userprefs | |
| .DS_Store | |
| obj/ | |
| Project/Library/ | |
| Project/Temp/ | |
| ### VisualStudio ### | |
| ## Ignore Visual Studio temporary files, build results, and | |
| ## files generated by popular Visual Studio add-ons. | |
| # User-specific files |
| #!/bin/sh | |
| echo "HEAD / HTTP/1.0\n Host: $1:443\n\n EOT\n" | openssl s_client -prexit -connect $1:443 |