There is a current consultation being undertaken by Harrow Council about a proposed Public Spaces Protection Order for Pinner Memorial Park and some other places in the borough.
Attached the consultation document and the PSPO formal notice for your information.
Below is the link to the on-line consultation form to complete if you so wish:
https://consult.harrow.gov.uk/consult.ti/PSPOPA/respondByQuestionnaire
Documentation