Gavin Barwell (http://www.gavinbarwell.com) has setup a petition for residents to sign to build an entrance/exit to the East Croydon station bridge.
See the article in Croydon Advertiser:
http://www.croydonadvertiser.co.uk/need-delayed-link-rail-station/story-25148242-detail/story.html
You can sign the petition here: