Thanks all for your help so far.

I've added the LWP::Debug to the script and for some reason every request is coming through as

LWP::UserAgent::new: ()
LWP::UserAgent::request: ()
LWP::UserAgent::send_request: HEAD http://bonnard/home.do/
LWP::UserAgent::_need_proxy: Not proxied
LWP::Protocol::http::request: ()
LWP::UserAgent::request: Simple response: Internal Server Error
http://bonnard/home.do/: 500

SO need to look into Proxies now me thinks...

Ant