Some of the information in the letter (gas pipe replacement / property entry point and meter relocation) looked as though it was of greater interest to our landlord than it was to us as tenants, so I thought I'd send an email alerting the landlord. Wales & West didn't provide an URL to an article on their website about the project, and nor is there any mention of it online. They did send a DVD though, but none of our PCs have a spinning media reader (I think they're museum pieces).
I got in touch with Wales & West and they promptly and kindly sent me a copy of the letter which I can email to my landlord. Just in case you'd like to do something similar, here is the letter from Wales & West Utilities about the 2013 Callington Road, Tavistock work.