Or he was originally intended to go south of the river ,but his associates contacted him and instructed him to go to East London. The police raided his brother 's and one other property in East London so he does have contacts in the area.At Tower Hill you can cross the road and change for DLR(Docklands Light Railway)
Was he heading to Woolwich or another end of line?
Or perhaps to fool people Heading the other way on DLR back to Bank Station?