Location scouting/working out final ideas for chase

this afternoon I went into Cambridge to try and work out where our chase sequence is going to take place (from where, to where).

I wanted it to start at Lloyds opposite eat in town, because it has impressive doors and looks like the kind of a building something important might be kept there (logical really considering it's a bank). The 'man with the briefcase' will then be chased/run down the road opposite to the market, then turning left into Lion Yard he will run the length of Lion Yard/the Grand arcade and up the escalator at the far end. This will be filmed from a variety of angles and then cut together in a dynamic exciting way. We'll will also be switching between the pursued and the pursuing.
At the escalator the shots get a bit more complex and I'm not sure I can explain them that well on here, we may try and get them now in pictures. But once upstairs the fleeing runs to the lifts and get in but the pursuers can't get in one so they run to the stairs. There will then be intercut shots of the man in the lift and the two chasing running up the stairs.
Then the 'man with the briefcase' will then come to the top floor and get out of the list coming slightly out into the carpark (the camera following him with a tracking shot), still inter cut with this will be the pursuers running up the stairs they will then burst out of the door on the other side of the car park. At this the 'man with the briefcase' will run to one side as will one of the others then the second will come round the back and he'll be surrounded. This will then lead to him pulling a gun and shooting the two, although this will be after the screens gone black, all we'll hear is two gun shots and the name of the film coming down in two parts with the gun shots.