@MoralityPondering I have had the experience of taking legal action against a surgeon in the private sector. You’ve been well advised here about some of the complexities of the entire process. It isn’t enough to prove a mistake has been made, it needs to be proved that most medics would not have made that mistake and acted differently.
Also this is brand new to you, it will not be possible to assess how much long term damage has been done for some time yet. Hopefully you may get more function back but that won’t be known for some time yet. Ditto your mental health and long term consequences of the lymph node removal and later surgeries required.
In short, I would leave it for a while. By all means have a chat with a CN solicitor but there’s no rush. However I do think the unavailability of the surgeon is quite a coincidence and you ( or someone acting for you) needs to be assertive and ask for a MDT meeting to discuss what has happened. If they agree to this and offer you any compensation do not accept it without discussion with your solicitor.
Financial compensation is the only end point of a legal claim, not an apology or an explanation (though you may get both). The compensation is worked out forensically and you need to be able to demonstrate your losses (needing help at home, ability to work, funding for therapies etc). The actual compensation for pain, suffering and loss of amenity is very small in comparison to your enormous trauma.
I will say that even with a shit hot lawyer this process is very, very stressful and can take years if the claim is disputed. You may not want to keep dwelling on this episode and having your story and condition challenged.
I wish you all the best and suggest you take a good chunk of time to simply process this part before moving on to the next (if you do).