So I have changed this plant's position from a well lit area last year with some direct sunlight in the afternoon (baring in mind it is the UK the sun is seldom very strong) to an east facing window protected by a white see-through curtain so it gets a little sunlight in the morning but then indirect sunlight in the afternoon. The window is much cooler in temperature than the rest of the house and more humid. I can post another picture also of the other side of the leaf for any experts out there! Much appreciated. P