Why most extension-of-time claims fail

A well-founded extension-of-time claim lives or dies on cause and effect. Most fail because the link between the delaying event and the critical path was never properly shown.

The first failure is contemporaneous records. If the as-built programme can't be reconstructed from site data, no retrospective analysis carries the same weight.

The second is method; the third is narrative — the claim must tell one coherent story a non-technical reader can follow.