In pictures: Glasgow helicopter crash tragedy pt 2 - Daily Record
Looking at the photos posted by the newspaper....any suggestion that the top of the Pub was the intended point of landing during an autorotation just does not hold water.
Compare the obstacles around the roof top....on the roof top...and then look at all the pavement and open areas that surround the Pub on two sides and all the obstructions on the other two sides.
Normally, one aims for the largest, most flat,least obstructed area when doing a forced landing.