Subject to certain provisos you have a claim against them for your loss.
This area of law is called negligent mis statement.
You have a cause of action against them subject to certain conditions
You will need to produce evidence that the advice was given unless they fail to dispute it.
You will need to show that the advice was not equivocal.
And the relationship must be of an advisor whose judgment you are reasionably entitled to rely upon (for example accountant and client).
Finally you will need to be able to show how the loss occurred and justify the amount.
I would start with a letter setting out the claim which states at the end that unless you receive the sum within a certain deadline such as 7 or 14 days you will commence County Court proceedings against them for the sum plus costs and interest without further recourse to them.
A claim would be allocated to small claims track by the court where the procedure is pretty straightforward and you can commence a claim online.
The search engine on your computer will bring it up if you put in "commencing proceedings online uk" or something similar.
I hope this helps if there are any further points please reply and I will be happy to respond.
They have altered the rule so there is no argument about them being culpable.
I would argue you should be able to rely on your HR department or line manager for correct advice, they both should know.
Finally your argument on loss is easy to follow and logical.
I would pursue this.
The payment date would be the date of which it would ordinarily have been paid but you should claim now to ensure it will be included in that payment.
It depends on the terms of the offer. If it is in full and final settlement and you accept you can take it no further. It is a final settlement and the only way you can challenge it is by saying you signed it under duress.
A court is unlikely to accept duress.
Yes they can argue that you could have stopped the implementation but how would you have known to do that. You were dependent on their advice and as a consequence of following their advice you lost £5000. It seems to me that they cannot get away from that.
I suspect the meeting is intended to fudge this over. The basic facts are simple their professional advice cost you £5000.00.
You can say that you intend to take proceedings , if necessary. In fact , I would make it clear that I will. But you need to show that you understand litigation is a matter of last resort and it is the company you would be suing. The company is vicariously liable for the acts of employees for negligence acts committed in the course of employment. The area of law is negligent mis statement. The case which provides you with a legal course of action is called Hedley Byrne v. Heller.
It is not the same at all . You are entitled to that sum without having to work for it.
Working and making good their loss is not the same at all . You have supplied services and you deserve to be paid for them.