| Lawson & Eltringham, South Shields 
 According to "A list of Shipbuilders of the Tyne" by P Dawson, Lawson and Eltringham commenced trading in 1883 and continued to 1886. 
They were based at Salmon's Quay and Shadwell Street in South Shields.
 
 The firm was a limited partnership between Thomas Lawson and JT Eltringham, for the design and building of the tug EL SIGLO. 
They also built another four vessels.
 
 The following is a list of tugs built by Lawson & Eltringham at South Shields:
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