Any advice or pointers on this would be wonderful

Arthur Rose born Dec 1874 appears in a roll of Honour booklet to the men of Rowley Regis and Area : Rose, Arthur 3715 Pte Royal Warwicks 3rd April 1919 33 Clifton Street
Thanks to Mathsgirl, we know that in 1892 he enlisted in the Worcestershire Regiment. In the photo below it shows that he was in the 4th Battalion - which seems a bit odd because on the Worcestershire Regiment website it says "4th Battalion raised in Ireland on 10th March 1900"

There is something written at the top of the page; does that mean that he P[osted] to the King's Royal Rifles 25/4/94 ??? What is that big "L" doing there?
Would he get a new regimental number after the posting? Is there any way of finding out more? Years ago Northern Lass and I tried to find his army records and thought that everything was lost in the WW2 fire.
Like I said, any ideas are welcome. Thanks.