This is a French title about Belsize Park in London. The song was written by Barry Mason and Leslie Reed for the British short film Les Bicyclettes de Belsize, starring Judy Huxtable and Anthony May.
Obbop from OzarkBought the tune on a 45 rpm vinyl record even though rock was my music of choice. Something about this ballad drew me in and has kept my attention over the decades. A lovely tune that I haven't heard on the radio for many years as it fades into obscurity. YouTube still offers a listen for the curious. Enjoy!