Hi Mike,
Thanks for the reply, I think you're absolutely right. The reason I started down the PBR idea was that I was going to use source IP but between the LAN and the Juniper firewall we have a Proxy server which NATs the internal IPs so I change it to destination and as you rightly say it will be much simpler to just use a static route.
Thanks again, I think you've saved me a lot of time!
Cheers,
Ben.