The DEMO version only includes 4 pages:
https://advinture.co.uk
https://advinture.co.uk/buy-wine.html
https://advinture.co.uk/product-category/wine-type/white.html
https://advinture.co.uk/product-category/wine-type/red.html

It is possible to download these free files and install them on your server, so you can test how the site works.
Visit https://www.waybackmachinedownloader.com/en/buy-wayback-machine-downloader-recover/ to buy a fully functioning site.
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