A signs a contract with B containing a clause in it that A is no longer happy to abide by. Let's say for example it's a confidentiality clause of some sort.
A contacts B and tells him that that he no longer wishes to abide by the confidentiality clause and invites B to take action if he has a problem with his change of heart.
A reassures B that this does not mean he will go blabbing to everyone who will listen. But A is clear that if he is asked about things that he has previously agreed to stay silent about he will not stay silent.
The statute of limitations says that a breach of contract claim has to be made within 6 years.
Does the 6 years limitation period begin in the above scenario as soon as A informs B of his intention to breach confidentiality if the situation arises? Or does it not start until A actually carries out an actual breach, which he may never do?