In uk.railway Roland Perry wrote:
Is the modest cost the planning, or the delivery? And you'd have
thought that TfL would have realised that thousands of homes would
produce enough SIL (or whatever) funding, but they say there's nothing
available.

"10.3 Cost Estimation
There will be two costs associated with passive provision
and early investment for the alterations to the existing BXW station design.
One is the cost for modifying the existing architectural, structural and
civil engineering design. The second is the construction costfor these
alterations.

10.3.1 Design Cost Estimation
Design only alterations has been estimated to be about circa£30,000 based
on a project team made up of Architects, Structural and Civil
engineersworking with the assumptions that:

* the WLO footbridge capacity will be similar to the BXW
footbridge,
* the WLO footbridge connections will be to designto existing
structurenodes therefore, no new columnpositionswill be required,
* Uniform level between the concourse and the WLO footbridge can be achieved
without alterations to BXW track and platform vertical clearances, and
* Use of similar construction type i.e. steelwork construction."
[snip]
"10.3.2 Construction Cost Estimation
The cost for the installation of the passive provisions and early investment
elements will need to be discussed in detail with the BXW contractor.
Although, this cost will be largelyfrom construction materialsit is possible
the other influencing factors could drive cost e.g. availability and lead
times for materials and plants, construction methodology etc. There is an
opportunity for early contractor involvement on this subject to identify
areas of opportunities and risks for efficient delivery."

https://www.barnet.gov.uk/sites/defa...rt_rev_p02.pdf


so presumably the cost is delivery of whatever needs to be delivered now, as
opposed to purely design work.

I would guess it would be possible to do it in future (the site would remain
available), but more expensively.

Theo