Widget image is sideways on some browsers

Hi,
I have a widget image on the front page of my site, which on my laptop views the right way round, but I have just noticed that on my telephone and tablet the image is a side view, which I don’t understand why, because when I check the tablet and telephone view on my computer, it shows the right way around. What can I do to change so that the image shows correctly on all devices?

Thanks
Jacqueline

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