Have been up for a look around, took an old carpet beater a couple fans to help.
There are rolls of pink fibre glass sheets between the joists with the loosefill sat on top. It’s granular of varying sizes and yellow grey mix of colours. There’s also an installation certificate dated 1997 stapled to the truss, warmcel cellulose fibre.
Looks like it’s not asbestos.
The images I’ve seen of Cellulose loose fill are the same. Thank god.