I've been trying to get a handle on exactly what this amounts to but
have failed to find any details diagrams or descriptions. Does anyone
have any or understand what's what?

My current under-informed guess:
- Trains from the Brighton fasts to Thameslink will go over it
- The Brighton Down Slow will go under it
- Thameslink trains from the SEML fasts will go over it (crossing the
Brighton Down Slow?)
- Kent trains to Charing Cross will go under it
- Where do Charing Cross trains from the Brighton fasts go - over it?
past it? either side of it?

Thanks.

U

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A blog about transport projects in London