The small rail-served factory unit for Callow Lane is now more or less complete:

The building is a branch premises of the small engineering firm Taffson Evans, which had a long history of occasional locomotive building back into the 19th century, although the Callow Lane premises was only ever responsible for the production of smaller, individual components.

When it was first founded, the firm was known as Taffson, Evans & Jenkins and they were responsible for the small fleet of 15" gauge 0-4-0STs for the Vowchurch Slate Tramway in Herefordshire:

More information on these diminutive locomotives and the narrow gauge railway that they served can be found in the book 'The Slate Railway to Churchwater' by Brian Clarke and published by Merlin Locomotive Works in 1977.

Subsequent locomotive construction was not well recorded, but the company dropped the 'Jenkins' part of their name in the early 1950s and began to develop a standard small industrial diesel, which they hoped to sell to industry and the MoD, an example of which is depicted here:

Not many were constructed in the event, and the company's trading position began to look increasingly precarious as the 1960s wore on. A management buy-out in 1970 saw the name change again to Taffson Engineering, with the company diversifying into components for domestic appliances and industrial switching gear. It was at this time that the Callow Lane factory was closed and production concentrated in the Rhondda Valley. Finally it was saved from the brink of receivership in the late 1990s by another takeover, this time by a Japanese company, who moved the company to an industrial estate near Peterborough and are now manufacturing cardboard office removals 'storage solutions' and trading as 'Pretentia'....

With apologies to those who may have read this rhubarb on the previous version of the forum...

The next structure is a more basic 'view blocker', to partially hide where the two running lines disappear into the fiddle yard. This is also meant to be some kind of anonymous industrial premises and is the structure behind the 08 (the photo was taken from the operators side):