DP'd Bayonet-Why?

[Donzi]

I've got a very good condition RFI MK II* bayonet, dated 1943, that's been stamped DP both on the base of the blade & on the cross-guard. This is the Indian war-expedient version w/rectangular cross-section wood grips & 12 inch single-edge blade. There's also a 3/4 inch-wide white band painted around the grips. I have a vague understanding of the DP condition in the British armed forces, as "Not suitable for combat use or issue", but I can't understand why this bayo would be placed in this catagory, unless the style was found to be unsuitable. Can anyone shed some light on this f/me? Thanks in advance f/any help you might be able to provide.
Donzi

Information

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[Mk VII]

For instruction purposes only - possibly safety-blunted.

[Donzi]

Nope, tip's not blunted. The entire bayo looks as issued.

[Thunderbox]

DP does not mean that the rifle/weapon was unsuitable for use - it means that the rifle/weapon was selected and prepared to be used for drill purposes only. In the case of the bayonet, it has evidently been issued together with a DP rifle as a set for drill.

[Donzi]

Thanks for the clarification, Thunderbox. I was sure that someone here would know the real story.