Click on this link to see the publication PDF A Guide to Representing Yourself in Court
Look to page 38 - Immigration Tribunals
(Although there's lots of other very useful chapters)
Look here also - Update to cuts/changes to legal aid for immigration advice:
Here's a useful UKBA Guidance for Caseworkers called - Reconsiderations
Please do bear in mind that formal Appeals are a legal process.
Reconsiderations (unless part of the formal appeals process) are NOT. The UKBA are under no legal obligation to reconsider any refusal.