My name's Jonny - I'm one of the developers with Raising IT and have been working on your new website alongside <designer>. I'm just attaching some documentation we provide to clients to help with preparing and uploading banner images to the platform. Specifically worth noting is that images should be cropped to <width> by <height>.
I've already cropped and uploaded a few images that you guys shared with us, so you'll notice these in your media centre once you have done training.
Please share this with anyone who might be responsible for preparing images for the new website.
Any questions - just ask!