BBC employees are being urged to sign up to trade union Bectu in the week that major changes are going to be announced at the corporation.
The union is bracing itself for a wave of job cuts and changes following an announcement by BBC director-general Mark Thompson to be made tomorrow.
After months of rumour and speculation over jobs, Bectu has insisted that compulsory redundancies and enforced staff moves, will be firmly resisted, with industrial action if needed.
BBC staff who are not currently in the union are being urged to sign up and strengthen the its bargaining hand when management begin negotiations on the changes.
No details will be available until Thompson speaks, but union officials are already warning that the BBC's staff could be facing the worst round of job losses since John Birt's workforce cuts of thousands in the early 1990s.
As the debate about a new Charter for the BBC heats up, Bectu believes that Thompson's plan for change is partly aimed at the Government, in a bid to demonstrate that the corporation is willing to tighten its belt in preparation for reduced income.