With the dawn of vertical video thanks to IGTV and YouTube, more and more content is being advertised in a vertical format. This also helps with the cost of advertising, as you can fit two vertical adverts in the width of one horizontal advert. I spotted these backlit images in South Kensington Tube station and I think they are really effective as portrait orientation images.
Billboard research – vertical advertisement
![Billboard research – vertical advertisement](https://samholtphotography.files.wordpress.com/2019/05/img_5454.jpg?w=1400&h=1867&crop=1)
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