‘(i) If the claimant asserts a duty which was not previously pleaded and alleges a breach of such duty, this usually amounts to a new claim. (ii) If the claimant alleges a different breach of some previously pleaded duty, it will be a question of fact and degree whether that constitutes a new claim. (iii) In the case of a construction project, if the claimant alleges breach of a previously pleaded duty causing damage to a different element of the building, that will generally amount to a new claim.’