Help with propeller blade ID

I’m an Aviation Forum virgin so trying it out for first time!

I have a wooden prop blade which I am keen to identify as to type and would welcome advice.

I am pretty certain it’s a Rotol-manufactured blade (RA stamp) but it’s lost its plastic sheath so no external markings except on base. Here is stamped JP226278 and RA1011?JC. (?= undecipherable figure or letter). Does anyone know the list of Rotol drawing numbers?

For the record this came from a ditch in Yorkshire 35 plus years ago, supposedly from a wartime crash site, but I’d have thought the fact that it is not broken (but is a bit frayed round the edges) and that it appears to have been deliberately dismantled from the boss, would suggest not a crash.

It’s laminated softwood and has no leading edge metal sheath. Also it has an unusually sharp “shoulder”.

Thanks in advance!