Thanks for the great advice, folks.
As I will be doing other works around the house, I might play it safe and get things checked over before I get too ahead…

That's what I'm hoping. From what I've been able to find out via google, it looks to be maybe hair or some kind of fine straw/grass.
This is reassuring.
Cheers

Hello all.
I was hoping that someone could please identify the material that I have uncovered in my home? I am removing an old fridge space/cupboard construction. Under the timber trim,…