Three months after a practical completion date a contractor submits a claim contained in four level arch files. What is the procedure regarding this?

Clause 4.23 of JCT Standard Building Contract 2009 and clause 4.17 of JCT Intermediate Building Contract 2009 state that any written claim being made by the architect must be within a reasonable time of the discovery that a contractor is likely to incur loss and / or expense for the grounds laid down. Generally speaking, legal precedent indicates that three months will not be considered a reasonable period of time.