Shire was commanding battles at the police training base, but there wasn't much intelligence to handle, leaving staff like aides, signalmen, and typists a bit idle.
This was because the aerial combat was still in the probing stage, and the Germans were preserving their strength without using new aircraft, which Shire was happy to continue negotiating.
Moreover, Xia Fei had forcibly separated air and ground operations, so Shire only had a general understanding of the intelligence on the Combray battlefield.
Shire knew Combray well, as there had been a historical battle there where the British Army concentrated over two hundred tanks to launch humanity's first tank mass attack against the German Army and achieved victory.