Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 136,062 pages of information and 218,531 images on early companies, their products and the people who designed and built them.
Makers of cast iron street furniture and heating and lighting equipment.
1810 Z. D. Berry started manufacturing heavy kitchen equipment and heating systems. [Surely not in 1810? - ZDB was born in 1816]. 
1847 Zephaniah Deacon Berry, ironmonger, Victoria Road, Pimlico (newspaper report of court case)
1870 Z. D. Berry, Albion Works, Wilton Road, Pimlico listed as mechanical engineers 
Supplied gas lighting for many public buildings, including, for example, The Grand Theatre, Islington in 1883 (then trading as Z. D. Berry & Sons).
1967 Richard Crittall Holdings merged its subsidiaries Richard Crittall and Co and Z. D. Berry and Sons, both of which were involved in engineering and contracting, into one unit called Richard Crittall and Z. D. Berry Ltd, in order to respond to the increase in size of contracts offered
Now part of Crown House Technologies (CHt)