The Home Office does not hold the information requested centrally.
The Home Office collects and publishes statistics on the number of arrests, including information on the number of arrests of those aged under 18 years old, on an annual basis only. Data are collected at Police Force Area level only, and information on the number of arrests at lower levels of geography are not held.
Data on arrests for the period up to March 2020 are scheduled to be published on 22 October 2020. Data for the period to March 2021 will not be published until 2021.
Data for the period up to March 2019 for both Lancashire and England and Wales can be found in the ‘Police Powers and Procedures, England and Wales’ statistical bulletin, available here: https://www.gov.uk/government/statistics/police-powers-and-procedures-england-and-wales-year-ending-31-march-2019