I raised the issue of the restricted TAF/METAR data and received the following reply:
Since the initial fact find we have invited a cross-section of general aviators to the Met Office to see what we have developed, and to take part in user testing. As a result we feel that we have created a product which is relevant and usable for you in the way that most of you now brief. This has been done in conjunction with consultation with the CAA to ensure that the product is still compliant with our regulated remit.
With regards to your concerns about only being able to view one TAF/METAR at any one time, please be advised that since upgrading our site we have received a number of feedback enquiries relating to this matter which are being collated by our Aviation sector managers. I hope this reassures you that your feedback is being reviewed by our Managers and will help to refine our service in the near future.
Looks like another "System Failure" and more feedback is required!