Hi @stustep and welcome to the forum.
The Gibson nailers get a mention in Graces Guide
https://www.gracesguide.co.uk/Bedlington_Ironworks where you can read that:
"During the first quarter of the nineteenth century the splitting mills became disused at the Bedlington works, and soon after that all the nailers shops, apart from one, disappeared from the town.
The last shop belonged to the Gibson family and can be traced back to the beginning of the last century. Mr. Gibson says he was forced to finally pull down the shutters of his shop in 1930. He has since been known in Bedlington and district as "The last of the Nailers".
Hope this is of use to you.