In message ,
writes

I thought there was no way to lengthen the South Tottenham platform due to
junctions close by?

Although tight, it should be possible - it was only about 15 years ago
that the platforms were shortened to two-car length (because of
subsidence). The following gives an idea of the original platform
lengths:

http://www.flickr.com/photos/10793813@N07/2038047821/

The section of the far platform with the inset fence (where the two kids
are standing) was entirely removed, and I think it was also shortened at
the other end as well.

It seems quite incredible that a short-sighted decision to reduce the
platforms at S. Tottenham in relatively recent times is now almost the
only reason why LO can't run the much-needed 3-car sets on the GOBLIN.
--
Paul Terry

Paul Terry wrote:

It seems quite incredible that a short-sighted decision to reduce the
platforms at S. Tottenham in relatively recent times is now almost the
only reason why LO can't run the much-needed 3-car sets on the GOBLIN.

Don't some of the other station platforms need work to reactivate the full
length? The unused section at Wanstead Park is rather decayed.