The walkways are glazed and uncovered, to ensure visibility and the whole arrangement is covered by CCTV cameras to improve security - so much as we can expect since the station staffing was slashed.
The towers are available in a range of colours - the grey has been chosen as a relatively unobtrusive colour for the flat metal facing. While I was there, there were certainly mixed views over the design, although most people who attended seemed to think that the addition of lifts was the most important aspect of this development. I've asked that CENTRO look at fitting the pitched roof shown on the top picture, as this would chime nicely with the existing roof of the station and they have undertaken to look into that. It is a particularly affordable solution, as the towers are largely pre-fabricated and can be installed with the minimum of track possession required. The height allows clearance of existing trackside lighting, but also for any potential future electrification of the line.