A workaround, or so it seems, would be to change your DNS. I was having the same issue until I switched from Google to OpenDNS. I'm also in the UK. Initial Nslookup:
Server: google-public-dns-a.google.com
Address: 8.8.8.8
Non-authoratitive answer:
Name: cdn.spacedock.info
Address: 37.139.17.225 After switching to OpenDNS:
Server: resolver1.opendns.com
Address: 208.67.222.222
Non-authoritative answer:
Name: cdn.spacedock.info
Address: 162.243.68.161
It's working fine from the looks of it now. I'm able to download/update.