Please any information on this rifle

Your rifle is probably one of the commercial Long Lees rifles commandeered during the Second World War, used for training and later converted into a cadet rifle. They were finally deactivated during the 1970s. I am very familiar with these; as a cadet I had to carry one!  Your example is the version issued to the senior cadets. The juniors were generally issued with Martini Enfield Carbines.

I attach photos of your rifle's original appearance and another of a "senior cadet carbine" to which I have added a magazine. My example obviously escaped prior to deactivation.