Consent conditions are constraints on the work. What was approved, with which conditions and what was expressly refused belongs to the job file, because a variation on a protected building is not a matter of preference.
The photographic record is part of what is being bought. Before, during and after, with dates, is what satisfies a conservation officer and what protects the company if a question arises years later.
Materials have to be recorded as used. Which lime, which sand, which mix and where it was applied is both a technical record and the answer when somebody asks why one elevation weathered differently.
Specialist trades book months ahead. A stonemason or a leadworker is not available at a fortnight's notice, and a programme that assumes otherwise stops on site while everybody waits.