BA Dispatchers

[Travelstops]

Hi
I've been told that to become a dispatcher with BA you need to do 5 years service before you've got a chance of getting a job. Is this true?

Also most companies recruit internally for dispatchers. I was wondering what happened if dispatchers want to change companies. Do they need to take positions as Customer Service Agents or Ramp Agents until dispatch positions arise within their new company?

Thanks for your help