VQOTW: POST BREXIT SUPPLIES OF DIGITAL SERVICES – VAT MOSS

I have a number of clients supplying various kinds of digital /electronically supplied services to businesses and consumers in the EU. Their activities include the supply of downloadable software and Apps, and access to information, photo or videos held online. They currently use the VAT Mini One Stop Shop (VAT MOSS) via their UK VAT registration, to account for VAT on the sales to EU Consumers. How is this going to change after we leave the EU on 1st January 2021?