A company let lease agreement would be great too.

I've been wanting this for ages, I thought I'd put a suggestion in for it before. 

Great idea. Standard Government documents could already be uploaded like the how-to rent guide, and information for tenants leaflet 

This is exactly what i came to post about, accidentally created a property in the wring portfolio. i now have a live tenancy but want to move it to a different portfolio without loosing all the associated documents.