Incomprehensible British leather piece of equipment, similar to apron (dated 1945)

[rocsta]

Hi all!
I need help to understand the utilitarian purpose of this leather accessory.
Red skin.
Size: 65x70 sm.
The sides of the upper drawstring - traces of stitching, probably for the lap belt.
Bottom-slot with glue residues along the edges of its perimeter.
Marked: (?)ASTLEGOL(?) CO. LTD.
1945
FA/100(?)1
108
What kind of gear?
Thanks in advance to all responded!

[ROBB]

Looks like a farrier ? or blacksmiths apron , he would wear when shoeing a hose , at a guess . Rob

[Marc Sherriff]

Looks like a farrier ? or blacksmiths apron , he would wear when shoeing a hose , at a guess . Rob

I would go with that.

Marc

[rocsta]

I would go with that.

Marc

Many thanks, gentlemans!