Bidy
I have a few Parker Hales, they are good solid working rifles, nothing really flash but very dependable, available here in Oz from the late 50's? to the 90's? from memory.
I have a catalogue that I can copy if you want - not sure of its date, it may take some digging but I'll find it if you want me too!
Don't ask me to post any pictures, sorry still not PC literate!

I think you have a model 1200 from what I can see with its skip checkering.
The Model 1000 was a rather plain Jane, the 1100 was a lightweight sporter I have one in 7x57 & the 1200 was a deluxe version, mine has been rebarrelled to .308 Norma Magnum
https://www.parker-hale.co.uk/index.php?pg=History&

From here it states:-
In November 2000, John Rothery (Wholesale) Co. Ltd purchased the brand name Parker-Hale and continue to manufacture many of the gun care items and accessories. Production of the rifles themselves unfortunately ceased. All enquiries relating to any Parker-Hale firearm should be directed to Norman Clark Gunsmiths at www.normanclark.com.

Best to give the gunsmith a email - hopefully they can help you.