Without examining the gun, I couldn't tell if the safety is defective or some other part is. Any HP safety should work, but for collectibility a genuine Inglis safety should be used. Check www.gunandknife.com
and go to the Other British Military Weapons forum. There is a discussion of the same point (by you?) and a fellow selling Inglis parts.
Any new safety will have to be fitted.
[This message has been edited by Jim Keenan (edited June 09, 1999).]