In answer to question re. marriage certs. Yes.
I have already been looking for lead miners moving
to Laxey from NE England for myself.
Your ' Durham' link means probably County Durham
not the city of Durham itself.
Here's a slight possibility , perhaps?
Ancestry 1851 Durham Escomb , a settlement round
an ironworks - Witton Park.
Peter Burns Head 38 labourer at iron works b. Ireland
Ester wife 23 born Northumberland Hexham
John H son 2 born --- ---- ----
& Thomas son 3days born Witton Park.