Thanks for the post nmb. As someone who works in Acquisitions for a property investment company, I can tell you that by far the most important thing for me is Return On Investment (ROI),and not yields. However, for what it's worth, I would typically look for minimum 8 or 9% gross yielding properties outside of London. But from an ROI perspective, again outside of London something above 7.5-8% is competitive (maybe 6.5-7% in places that are starting to shoot up in value like Manchester).
Hope this helps - if you'd like to find out any more about this or have any questions, do not hesitate to get in touch.
Thanks,
Paul
(PS - this is my first post - hopefully of many!)