https://www.gov.uk/government/news/public-offered-fuller-say-on-plans-to-upgrade-a358-in-somerset
Public offered fuller say on plans to upgrade A358 in Somerset - GOV.UK
A further consultation on plans to upgrade the A358 between the M5 at Taunton and the A303 Southfields in Somerset will be held early next year.
https://www.gov.uk/government/publications/a303-a358-and-a30-corridor-feasibility-study-overview
A303, A358 and A30 corridor feasibility study - GOV.UK
Overview and outcome of a feasibility study into upgrading the A303, A358 and A30 corridor and creating a new expressway for south west England.
feasibility studya303a358corridoruk
https://studylib.net/doc/27618609/a358-a358m-24%E8%8B%B1%E6%96%87
A358/A358M: Stainless Steel Pipe Specification for High-Temperature Use
Standard specification A358/A358M for electric-fusion-welded austenitic chromium-nickel stainless steel pipe. High-temperature service.
stainless steel pipehigh temperaturea358specificationuse