Do you have a fixed IP address on your blueyonder connection? If you do all you have to do is enable remote access to your home machine, and select the users that you want to be able to connect to your machine. Then from your work pc just start a new remote desktop connection, puting in the IP address of your home pc. There are several options that you can set, regarding what data you receive from the remote machine, ie sound etc.
Just remember to leave your home pc on.
ps, I am assuming that RMA was a typo and you meant RAC