• inspection took place on the 29th July 2013
• full report was received by BaxterStorey on the 3rd September 2013
• refurbishment programme commenced on Monday 23rd September

They took over when?

This suggests that they weren't aware of how bad they were doing until Hillingdon Council told them. They only appear to have acted after the report, so don't seem to have a satisfactory system of self-evaluation in place.

I'm pretty shocked that neither BA, nor BS carried out inspections of their kitchens and acted upon it earlier.