glitterball - 7:50 am on Jun 23, 2013 (gmt 0)
I managed to get the pages removed.
Actually the hosting company were very helpful:
1. Having failed to contact the website owner using the whois info, I contacted the host, who in turn, attempted to contact the site owner.
2. Since no action was taken, I contacted the host again and they advised me to file a DMCA request. I did this and the offending pages were removed very quickly.
In my case, it was very obvious that the content was all copied from my site, so I'm sure this helped.
Hopefully, my old rankings in Google will come back...