Lync standard 2010 with pbx, adding SIP trunking as as endpoint in different country.

Hi All

We currently have a Lync Server 2010 Standard with a PBX for about 50 users, located in Denmark.

We wish to add a small UK site to the solution 9 users, they will need IP phones to call with, the site have a MPLS or a VPN connection to our network in Denmark.

Is it possible for me to set this up with a SIP Trunk from a UK supplier, I was thinking that I can set up a policy, PSTN usage and route for the UK users to use the SIP Trunk, and not having to set up any hardware on the site other than the IP Phones.

Would i need another mediation server for this, or can i use the one in the Lync 2010 Standard configuration?

Thanks in advance.

Niklas