A Jazeera article https://www.aljazeera.com/news/2019/4/1/churchills-policies-to-blame-for-1943-bengal-famine-study which links to a Geophysical research paper, below.
Geophysical study by Mishra et al 2019 finds that the 1943 famine was not linked to drought, contrary to some British claims. This reinforces the historical accounts of Churchill diverting grain from starving Bengal, simply to build up reserve grain for the British military. See also this account by Jason Hickel 2022 in the New Internationalist. https://newint.org/features/2021/12/07/feature-how-british-colonizers-caused-bengal-famine#:~:text=The%20Bengal%20famine%20stands%20as,more%20fell%20into%20crushing%20poverty.