by
The Assassin’s Creed Valhalla Londinium Bureau Gear Chest allows you to unlock the Hidden Ones’ Mask while exploring the city of Lunden, and just like the Hidden Ones’ Gloves (in Ledecestre), this piece of gear is a bit tricky because you’ll have to enter the Hidden Ones’ Bureau.
The AC Vallhalla Londinium Bureau Gear Wealth collectible is hard to reach if you don’t pay close attention to the environment.
The good thing about it, though, is that once you find out how to enter the Londinium Bureau, you’ll also be able to find a new Codex Page for A Brief History of the Hidden Ones quest.
So, first, let’s get the gear at this location.
Assassin’s Creed Valhalla Londinium Bureau Gear Location
As you can see on my in-game map below, this collectible is found in the northeastern part of Lunden.
Quite easy to see, yet harder to get.
One thing that you should also notice is Eivor’s location on my map. Notice that he’s standing west of the actual collectible.
How To Get The Londinium Bureau Gear
Once you get to the location of this collectible, look around, and you should see Lunden’t city wall. Climb on it, looking for a tree branch that looks just like the one in my picture.
While standing on it, you’ll have to perform a Leap of Faith inside the round building below you.
No need to worry because you’ll land in an old Roman pool, so yeah, it will be a soft landing.
Good, so now you are inside the Bureau, except that to get the gear, you’ll have to get close to it.
Now, when you are inside the said pool, you can get outside and check out the room, but you won’t find a way to advance because there is a locked door.
So instead of going out of the pool, the moment you land, dive down and turn right.
The Underwater Entrance
While underwater, scan the area and look for a wooden door partially covered by algae.
That’s the way inside the Londinium Bureau, as you can see in my screenshot.
Smash the door with a melee attack and keep swimming; then, when you exit on the other side, you’ll find a suspended platform and a rope.
Underwater is also a chest containing a Nickel Ingot, so make sure you dive in the next pool, then head up and jump on the said platform.
From this platform, jump on the rope, then turn around and go around the corner swinging on the suspended poles. Your goal is to reach the breakable wall in my screenshot.
This wall is your final obstacle, but you’ll have to use an explosive arrow on it.
Now, once inside, collect The Magas Codex, Page 1 (also pictured below), and next to it, you’ll find the Londinium Bureau Gear chest.
Before you leave the area, though, don’t forget to fully explore it because you’ll find two notes (Hidden Ones’ Contract and Journal of Magister Vitus), as well as the Londinium Bureau Key, that will help you exit this location.
And that’s it, friends. That’s how you get the Assassin’s Creed Valhalla Gear inside Londinium Bureau in Lunden.
by 
Ubisoft always rushes shit out and bugs abound. I thought this was yet another but you clarified and I thank you.
You’re most welcome. Unfortunately, I have a game-breaking bug that doesn’t allow me to complete the game. I am 99.9% done and need one final cutscene to end this game. Yet, I can’t, so you have a valid point.
uhm so, in trying to get the gear in Londinium Bureau, there’s no need for any explosive arrows or anything. Instead, go the that hanging wooden plank (which is at the end ykwim) and then jump towards the building/room that you see in the front. Stand there and when u look inside the window thingie through the iron bars, you’ll see oil jars placed behind that weak stone wall. From here, take an aim with your arrow and point it towards the arrow. Move around till the arrow shows a red crosshair on that jar and then boom, your gate is open <3