Hi Skandia,
I tried a larger image to see would it fill that space, but that was only after the white space existed with all images at 1920px x 1080px. I removed the larger one again but it was still the same, so copied the css code you posted. that got rid of the white space beneath image, but the images then sat to the left with a white space to the right (on my desktop). So I changed the dimensions in the css to 1920 x 1080 and it seems fine now. Thanks for your help, much appreciated!