I�ll just deal with the bail issue as the rest of it is a bit too garbled for me to understand.
Once a case is concluded and the defendant is sentenced (if he is convicted) or discharged (if he is acquitted) bail can no longer be imposed. Bail is used to secure attendance at court for the next hearing and once the final hearing has taken place it is no longer applicable. So any conditions that may have been attached to the bail (e.g. not to contact witnesses) no longer apply.
However, witness intimidation is a crime itself and can be charged separately to any other charge and regardless of whether bail conditions are in force or not. This is covered by the Criminal Justice and Public Order Act 1994: section 51 and the maximum penalty is five years custody. For the purposes of the act witnesses remain protected for twelve months after the case has concluded and regardless of whether it resulted in a conviction or not.