The No. 9 Mk. I bayonet has an interesting history. It represents the culmination of a post-war desire to replace the No. 4 spike bayonet. The first attempt to do so resulted in the innovative No. 7 Mk. I/L bayonet. With the War Department's decision not to issue the No. 7 Mk. I/L bayonet with the .303 caliber Lee-Enfield No. 4 rifle, there remained a strong desire to replace the No. 4 spike bayonet. Compared to the elaborate No. 7 Mk. I/L, he No. 9 Mk. I was a much simpler, utilitarian affair, with a sturdy socket pinned to the clip-point blade of the No. 5 Mk. I bayonet. Because the No. 9 Mk. I blade was closely patterned on the No. 5 Mk. I bayonet, the No. 5 scabbard was retained for use with the No. 9 Mk. I bayonet. Production commenced in 1947, even before the No. 9 Mk. I was officially approved. (They couldn't off the No. 4 Spike soon enough!). Indigenous versions of the No. 9 bayonet were also produced in Pakistan and South Africa.

I just brought examples of all the types from the cruciform pike thru No.'s MkI, MkII, MkIII pikes the No.7 and No.9 so I can fit up my No.4's for any period I wish.
The bayonets are like the 303's they grow on you and just keep landing in the collection I stopped going for makers as that is just another whole can of worms.

I did start that quest with the No 07's but when you start getting into the Moles, Vickers, Chapmans, James Arthur Chapmans (JAC), Lithgows, OA's & Siamese issue etc it wallet emptying.
And as far as a Lithgowicon Quillon goes forget that or any one of the type the cheapest I have seen is a roughie at $1600.oo/AUD up to $5K for some.