Serpentine belt slipped off

My 1998 Disco slipped its serpentine belt today and I noticed that the power steering pulley was out of alignment. I am able to push the pulley in and out of the housing with ease and the shaft seems to be attached to the pulley. Is this a new pump job, and if so, how easy is it to replace?

Any help much appreciated.
Elwyn

yes you will need another pump ,simple enough job but slacken the pulley bolts before removing belt, theres 4 bolts hold pump bracket to aluminium housing you need to remove