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Item #: SCP-4XXX

Object Class: Euclid

Special Containment Procedures: SCP-4XXX-1 is to be kept in a secure locker at Site-██, near London. At least once per day, the item should be thoroughly checked by research personnel of clearance level 2 or higher. Any changes are to be reported to the site manager within twenty-four hours. In the event that the map or the "Check before you travel" information within SCP-4XXX-1 changes to display a station being closed, containment procedure 4XXX-"Mind the Gap" is to be enacted as detailed further down this document.

SCP-4XXX-2 is to be kept in a standard humanoid containment cell furnished with all basic amenities at Site-██. SCP-4XXX-2 is permitted to wander the low security areas of the facility and may eat and socialise with the staff and borrow books from the library. SCP-4XXX-2 may request items for his own comfort and entertainment. The following items have so far been approved for addition to the subject's containment cell:

• One television with access to all standard Freeview channels.
• Several boxes of ██████ brand miniature electric railway tracks and rolling stock, recovered from the subject's original place of residence.
• A daily subscription to ███ ████████ newspaper.
• A bi-weekly subscription to Rail Magazine.

Any attempt made by SCP-4XXX-2 to leave the facility is to be treated with severity. It has yet to happen, but punishments could include isolated containment and the confiscation of his miniature railway.

Following the August 2018 incident, the special containment procedures for this item are subject to change, pending further research.

Description: SCP-4XXX consists of two contained items, referred to as SCP-4XXX-1 and SCP-4XXX-2.

The first item, SCP-4XXX-1, is a leaflet containing a map of the London Underground railway network. Its main anomalous property is the fact that it appears to be an issue of the leaflet from a year in the future from whenever it is being viewed. For example, if the leaflet is viewed in September 2018 it will display the London Underground network as it will appear in September 2019.

The second item, SCP-4XXX-2, is a 77-year-old white British male whose internal bodily structure is anomalously interconnected with the London Underground railway network. X-ray imaging and keyhole surgery have revealed that his body contains a series of tiny railway tunnels which are topologically identical to the lines of the London Underground network as they appeared in 2003. Whenever a train stops at an "afflicted" station within the real London Underground network and then continues down the track, it will be anomalously shrunk down and transported into the replica within SCP-4XXX-2's body. Any passengers or other items within the train are also shrunk down and transported. This only occurs if the train first stops in the station. If a train continues straight through without stopping, it will not be transported.

"Afflicted" stations can be identified in advance using SCP-4XXX-1. Stations marked as being closed on future versions of the map will become "afflicted" at the date indicated in the "Check before you travel" information. The amount of time for which a station is "afflicted" has varied anywhere from two days to three years. Containment procedure 4XXX-"Mind the Gap" should be carried out at "afflicted" stations as summarised here:

Firstly, Foundation agents planted within Transport for London should determine whether the station closure for the date displayed in SCP-4XXX-1 has already been scheduled by the organisation. If it has not, the agents should ensure that a closure is scheduled by organising engineering or improvement works as a cover story.¹ Upon the station's closure, construction workers should be dispatched to the station to carry out the engineering or improvement work. A small team of agents accompanied by available members of MTF Epsilon-12 ("The Train-spotters") are also to be dispatched to the station for the duration of the closure. They are responsible for ensuring that no trains stop on any platform within the station. In the event that a train does stop in the station for emergency reasons, the train should be evacuated of all passengers and then sent along the track autonomously. Passengers should be released with an appropriate cover story. The use of amnesiacs is permitted at the discretion of the agent in charge. Once the closure period is over, Foundation personnel may leave the station and allow service to resume as normal.

The Foundation is researching the possibility of sending an exploration team into SCP-4XXX-2 to perform research and, as a side objective, attempt to recover the disappeared passengers. However, there is currently no known way of returning items from SCP-4XXX-2 to their original size, as the mechanism causing the shrinking is unknown.

Instances of SCP-1017 do not seem to interact with SCP-4XXX in any unexpected ways, and have never had reason to stop in an "afflicted" station.

Addendum 4XXX-a: The following is a log of notable events involving SCP-4XXX. It does not include details of every "afflicted" station.

+ Show event log

Date	Event
June 2006	The first "afflicted" station, Shoreditch, was identified and closed down by the Foundation and the ADC,2 but not before several trains full of passengers had already been transported into SCP-4XXX-2. The East London line was redirected as a cover story for the closure. SCP-4XXX-1 and -2 were identified as being connected to the phenomenon and taken into containment.
September 2008	SCP-4XXX-1 displayed a version of the London Underground map from September 2009 which was completely missing the River Thames, which is usually illustrated on the map. The Foundation began making preparations for an XK-class End-of-the-World scenario in which all of Earth's water would disappear. However, the change turned out to merely be a design choice, and was reverted in the next version of the map.
March 2009 to February 2012	Blackfriars station was "afflicted" for an entire three year period, during which the Foundation arranged for the station to be completely rebuilt in line with the pre-existing Thameslink upgrade project to give themselves time and space to research the anomaly. Most of the Foundation's current understanding of SCP-4XXX was established during this time.
April 2015	SCP-4XXX-1 predicted the closure of Paddington station from April to September 2016, but only on the Bakerloo line. To avoid having to close down the entirety of such a high profile station, the Foundation only shut down the Bakerloo line platforms, under the pretence that they were renovating the escalators to those specific platforms.
July 2016	A passenger accidentally set off fireworks on board a Bakerloo line train, leading the train to come to an emergency stop in Paddington while the station was "afflicted". The train was safely evacuated of all passengers and the driver, and amnesiacs were distributed to employees of Transport for London as required to cover for the subsequent disappearance of the train after it was sent into the tunnel autonomously. So far, this is the only time a train has come to an emergency stop in an "afflicted" station.
August 2018	Routine containment procedures were employed for the closure of Ladbroke Grove station for two days, under the pretence that the ticket facilities were unavailable. However, during Foundation occupation, a train anomalously materialised on the track and came to a stop at the station. The train was covered in various bodily fluids and a large amorphous creature disembarked and attacked the agents. It was destroyed with no human casualties. Subsequent analysis revealed the creature to be an enlarged version of one of SCP-4XXX-2's white blood cells. Revisions to the special containment procedures are being considered to account for this new development.

Footnotes

1. Several researchers have pointed out that SCP-4XXX has actually been beneficial to the efficiency of London's transport network due to the amount of cover-up improvement works carried out by the Foundation.

2. ADC: Anomalous Defence Corps, the anti-anomaly division of the British military.