Make it a requirement that the Home office has to respond within 2 months with a fresh decision and that while the matter is being considered the individual has evidence of their previous status continuing while the new decision is being made.
One example of the difficulty for such individuals is a 20 year year old who sent her papers to the Home office in 2007 as her limited leave to remain ended, having been granted when 14. 3 years later she is now so frightened of being sent back that she will not pursue enquiries to find out what is going on. She is unable to work, train, study, and generally conttribute to society because she has no documentation as proof of her status. There are many others.