Many thanks for your patience. Whilst I understand your argument and the position you are faced with, unfortunately a verbal indication of when you would be leaving is unlikely to give you any strong legal rights, especially in ensuring that you are allowed to leave then. Your employer must have given you formal notice of redundancy and this should have been in writing, confirming that you are actually served with notice and when your termination date would be. This never happened and all you had was a verbal indication, which will unlikely carry any legal weight. I know you said you had made plans around this, but in hindsight you should have asked for formal confirmation of the leaving date rather than taking the verbal indication as being something set in stone.
In terms of any potential breaches, the employer is pretty much in the clear...for now. They would be in breach if they actually went ahead with the redundancy and terminated your employment, without having gone through a fair redundancy procedure. They still have time to fix this and make sure it is all done above board before they actually terminate your employment, you have mot been issued with formal notice of termination yet so they still have an opportunity to ensure that a fair procedure is followed before they formally give you notice and confirm the redundancy.
You are of course free to raise a formal grievance over this and how it has been handled so far, perhaps it could prompt them to reconsider their position and meet the original date, but the main point is that you cannot legally force them to do so and it is very much in their hands.
I'm sorry if this is not necessarily the answer you were hoping for, however I do have a duty to be honest and explain the actual legal position. This does mean delivering bad news from time to time. I hope you understand and would be happy to provide any further clarification if needed. If you are still satisfied with the level of service I have provided regardless of the contents of the answer, I would be grateful if you could please take a second to leave a positive rating by selecting 3, 4 or 5 stars above. Thank you