"Paul Scott" wrote

You will only ever see NLL & WLL frequency increasing incrementally, up to
4, 6 or maybe 8 tph over overlapping sections of the line, because it is
also a goods line. When Ken talks about 'metro style frequencies' he seems
to mean better than 4 tph, which is when it is considered (by many) that
you
don't need to worry about the timetable. The ELLX plans are initially
based
on 12 tph through the tunnel, and that is limited to 8tph south of New
Cross
Gate, because it is then integrated with the main lines towards
Croydon/Crystal Palace.

Current ELL proposals are 4tph from each of New Cross, Crystal Palace, and
West Croydon, combining to 12 tph between Surrey Quays and Dalston Junction,
though only 4 tph on to Highbury & Islington. Phase 2 would add 4 tph from
Clapham Junction via the South London Line.

Peter