The easiest directions are:
Nearest underground station, Piccadilly Line, South Ealing, turn right towards Popes Lane, cross roads, you will see the cemetery on the left hand side.
Whichever way you approach the cemetery, go through the main entrance in South Ealing Road, under the arch way where the chapels are, continue straight down the pathway until you come to a small lane, go straight across and into the new part of the cemetery. Seeing your relative was buried 1940 she will be there.
Hope this is of help.
Carol