I'm not sure re. the structure of these forums, so rather than post my question as another answer I have simply re-asked the same question as this thread. Let me know if this is not the preferred way to revive a topic.
My installer unfortunately failed to retrieve the Portal ID and if I can save a few of hours driving that would be great. I have the S/N.
Pretty boring first ever post, I'll try harder to be more interesting in future!