I don't think Woolstone Road is at high risk of flooding as it is downhill all the way to Catford. However, it adjoins higher streets and can get the run off from them, which can cause localised flooding if the drains are inadequate. I have just reported the drain outside 67 as blocked. I think drain blockages mauy have caused problems in the past.

Normally the height above sea level will indicate the risk of flooding. Flood areas will normally be adjacent to rivers.