Mission 4: The Making of da Bridge/Bridge

''You send yourself back to 1209 and find the London Bridge. You meet some workers and see a strange figure wearing an old Toyko vest. You run all the way across the bridge, jumping on the railing as you come to the gap. He is gone when you have fully crossed. You enter a shop called Tokyo Fixed. They sell bikes here. You gather a bunch of money and transfer it into London Money. You buy a bike and ride it over to a construction site where they are redoing a shop called Loop that does knitting. You borrow some tools and help. You wonder which part to do.''

Parts
Help with making and assembling the metal.

Help with the strings and standing the rest of the bridge up.