You can increase the defiance of City of London by spray painting all 3 locations. This also unlocks an exclusive operative.
City of London has around three paste-up locations, you can use to increase defiance and unlock the Beekeeper in Watch Dogs Legion. This guide will help you to find all three paste-up locations easily just refer to the map screenshot below. All three places are located on top of the buildings. You will need a cargo drone, and you can unlock that by recruiting a construction worker.
Go to Old Bailey and look at the backside of the building to find the paste-up location in the City of London. Just follow the street and keep looking at the backside of the building.
This one is located in the restricted zone called The Spine. The billboard is situated on the top of the tower with a pipe structure.
This paste-up is in the region called Horizon Multinational. In an area with massive blue buildings. Look for a construction site in between the buildings and you will find this paste-up location.
So this was all three paste-up locations in City of London in Watch Dogs Legion. Do check our Watch Dogs Legion Wiki guide to know more paste up locations.