Get rid of the white space around each image

On closer inspection, what is causing this is the “top” css attribute on the image on the second row, which is 5 pixels/bits off the last row.

How can I change this? I don’t want any gaps where possible. Every image will be the same width so there should be no gaps like the example in my first post.

Aye that does it, thank you sir.

Finally, what’s the filepath I should use to override this file in case of future updates please? I had a go but it wouldn’t do it.

I see. Thanks for your support! 🙂