Vu+ Duo (SkyHD Channels) to USB HDD to BluRay

Hi,

I want to be able to record from a Vu+ Duo box to USB HDD (that part is sorted) and then record that onto a BluRay disc. Would I need to convert the recording first or can I put it straight onto the BluRay disc?

If I need any particular software, can anyone recommend any please?

I haven't ordered the BluRay recorded yet, just want to know whats involved first. Hoping to get an internal one for my PC.