Plans are proceeding to redevelop part of Walthamstow Town Centre. This involves changes to the Town Square and part of the existing shopping centre. Within the development's Design and Access Statement there are two Tube related points on interest. One of is a brief overview of TfL's intentions around improving accessibility at Walthamstow Centre and then the potential, at a later date, another entrance within the expanded shopping centre. Looks like TfL are aiming to add lift access and finally demolish the "temporary" (since 1968) ticket hall and put in something newer with a direct link down to the mezzanine tube ticket hall level. A secondary means of escape would be added about half way along the the platforms and I assume this could, at a later stage, provide a link to a second station entrance.
The D&A document may take a while to load - it's 211 pages. The Tube bit is at page 28. The site of the new possible entrance is on page 25. At this stage this is all a bit tentative and will have to be resolved as part of whatever final settlement is reached over developer contributions if the Council approves the scheme.
As a local I am far from impressed from yet more non descript looming towers being plonked in the town centre but that seems the way of things these days.
Anything higher that looks like its made of brick but is higher, such as the Chrysler building, is actually a steel framed building employing decorative brick cladding that contributes nothing to structural integrity.
Brick also is not a particularly good insulator as regards temperature / energy efficiency unless it has additional insulating materials added behind it.