A bit of a call for help and recommendations...
We are building a living room extension to our 1880 croft house and all go from May. Plans and building warrant all in place etc. I have a great stone mason, digger chap and electrician whom I've used before when we did our stealing conversion, but all the other trades people I've still yet to get on board. Also I need some large aspect windows and one mock sash window made (wood not pvc).
We are based 20miles north of Aberdeen and I'm wondering if folks on here can make any good recommendations for the following:
Joiner - build all timber frame work structure and roof
Plumber - to well plumb in 2 radiators into our existing system
Slater - to well slate / do lead work and top
Wood windows - supplier who can get close to or replicate our current mock sash windows
Granite stone plinths - we need some older style granite plinths to work around the windows sills and the gable end
Structural engineer - to make a calculation on a section of wall we want to remove to open out a fire place to be double sided etc.
For those who have experience or can recommend please do, as I would like to complete the build by the end of this year. Our foundations are starting mid May so looking for people to be available from June

Thanks in advance
James