Ifound there
http://www.ncadc.org.uk/toolkit/re-entry.html
If you left the UK voluntarily and at no public cost, the length of the re-entry ban is one year
If you left the UK voluntarily within six months of exhausting all your appeal rights or being told you would be removed from the UK but at public cost, the ban is for two years
If you left the UK voluntarily more than six months after exhausting your appeal rights or being told you would be removed from the UK and at public cost, the ban is for five years
If you were forcibly removed/deported from the UK, the ban is for ten years
If the Home Office has decided you used deception (and this has not been successfully challenged in court) in your application – whether or not your application was successful – the ban is for ten years
Which one is for me?