A passer-by has captured the heart-warming moment school kids helped a stranger cross a flooded underpass.

The video was captured at the underpass near Moorgate Play Park on a footpath connecting Middlemarch Road, in Toftwood, with Dereham.

In the video, a school-aged girl is seen wading through ankle-deep water to push a woman to safety in a shopping trolley. 

Darren Money, whose wife was in the trolley, uploaded the video with the caption: "Kids often get a bad rep, but outstanding from this young lady offering transport over the flooded subway."

The underpass has been the focus of public attention recently due to its likelihood to flood during heavy rains, forcing pedestrians to find alternative routes and adding miles to their journeys.

Mr Money said the experience was "refreshing" and they were "such kind-spirited, friendly and fun kids".