https://consultations.tfl.gov.uk/london-overground/old-oak-common/consult_viewPrecis:
The Government has announced proposals for a new High Speed 2 (HS2▸ ), National Rail and Crossrail station at Old Oak by 2026, potentially making it one of the best connected railway stations in the UK▸ .
However, the current plans do not include a connection to the London Overground services that currently pass through the area. Both the Mayor and Transport for London (TfL» ) consider this is a missed opportunity to integrate HS2 and Crossrail with the local transport network, improving connectivity and supporting further economic growth of the area.
We are looking for your views on the principle of creating a new London Overground station at Old Oak and on three options to connect it with the HS2, National Rail and Crossrail station. All three options are feasible, but offer different levels of passenger benefits and local impacts.
Transport for London have assessed various options for the Overground station at Old Oak Common and have narrowed them down to three possibilities:
Option A: ^ a new viaduct running to the north of Wormwood Scrubs, allowing WLL trains to join the
NLL▸ , just south of Acton Wells Junction, with a new station on the NLL adjacent to Old Oak Common Lane.
Option B: WLL trains would use the existing South West Goods lines to a new station on the NLL adjacent to Old Oak Common Lane, where they would reverse and use the NLL to continue to Willesden Junction.
Option C: two separate stations, one on the NLL adjacent to Old Oak Common Lane, and another on the WLL adjacent to Hythe Road with pedestrian links to
OOC▸ HS2 station.

(The links to the options above will load .pdf images of detailed maps for the proposed layouts)
The full Options Assessment Report from Transport for London can be read at the following link:
https://consultations.tfl.gov.uk/london-overground/old-oak-common/user_uploads/options-assessment-report-v1.0.pdf