So, a friend has been working at a place almost 3 years and a few months ago decided to resign. It was all quite amicable and despite having no contract she agreed to work 6 months notice to help the company get someone else in. Jump forwards to now and it seems that the big bosses weren't happy about what her boss had agreed to. They fired her boss and won't honour the original agreement. They want her to continue working, and agree to a new 6 month notice period. Presumably she can just tell them to FRO and walk? Clearly they're not going to be any use for a glowing reference anyway.