London Wiki

Area in the London Borough of Harrow close to the border with the London Borough of Hillingdon.

Pinner was originally a hamlet, first recorded in 1231 as Pinnora, although the already archaic -ora (meaning 'hill') suggests its origins lie no later than c.900. The name Pinn is shared with the River Pinn, which runs through the middle of Pinner.

Served by Pinner Station and various buses.

More information on the Wikipedia page [1]