Of note elsewhere in the country...
There are plans - approved by planners - for the majority of the station buildings and pretty much all the car parking at Redhill to be replaced with a major development, incorporating new versions of those facilities - plus flats, a Waitrose supermarket (incidentally, opposite the new Sainsbury's store which should have construction starting soon) and a number of smaller shops. Sadly, there is little in the way of a publicly-available timescale for the works, though I can report the following:
The subway is in the process of having parts of its walls/roof rebuilt, plus there's a new lift being constructed from the current ticket hall to said subway, ensuring that both entrances will be step-free. For practical reasons, the subway and new lift shaft are incorporated in the overall redevelopment plans. The old newsagent's shop in the ticket hall has been used as a shelter for builders, but is now gradually being removed.
Some, if not all, of the toilets have been refurbished, and the waiting room on Platform 3 is now redecorated, with more modern and comfortable furniture. There's also a heated/air conditioned shelter at the North end of Platform 1/2, though that's been in place for a couple of years now.
Lastly, major road layout changes are underway in Redhill town centre, which should hopefully include the area around the station, including more convenient positions for the pedestrian crossings in the vicinity. These changes are not part of the station redevelopment, but those masterminding the regeneration efforts are trying to ensure both projects are completed in harmony.
Information:
http://www.redhillforward.co.uk/