View attachment 584340
I just graphed the data from the website
British Weekly Fighter Aircraft Production, Apr-Oct 1940
There is a dip of production about the middle of August, at the height of the BoB, for both the Hurricane and Spitfire.
There is a dip of Spitfire production in late September, not really for the Hurricane.
There were three raids on the Supermarine works in September 1940. First was a small raid on the 15th by Me 110s, which did little damage.
The second was on the 24th of September by Me 110s which did little damage to the factory, but killed 42 people and injured 161. Three aircraft did attack later in the afternoon as well.
The thirds was on the 26th of September, with 60 He 111s and 60 Me 110s. This destroyed the two Type 317 prototypes, three Spitfires and damaged 20. 55 workers were killed and 92 injured.
This lines up with the dip in the graph in late September.
Overall the trend for Spitfire production was up over this period, while Hurricane production peaked before the battle and trended slightly down afterwards.