Thanks for the info squaddie.As they say "hindsite is a great thing".
With hindsite she should have went back to CAB earlier and maybe found out about an Employment Tribunal and the time limit. I do feel CAB let her down because when she first saw them, although they let her see all the relevant employment rules saying here employers were wrong in the course of action they had taken,they never mentioned that she could take them to an Employment Tribunal.
I also found out it takes about 24 weeks for an E.T to make a decision, so without "sick pay"she would have had no income for the period. If she had opened a claim would the fact that she was on "sick pay" have made any difference ?