Parr was recognised in the Queen's 2021 birthday honours with a CBE for services to photography and was "one of the best-known documentary photographers of his generation", according to a description on his foundation's website.
The US-based merchant bank Raine and Greek media mogul Theo Kyriakou are among the backers of the former Mirror editor and CNN anchor as he raises funds to grow the Uncensored media brand, Sky News learns.
Oliver will start with a Jamie's Italian in London's Leicester Square next spring in partnership with Brava Hospitality Group, which runs Prezzo, another chain of Italian restaurants.
Netflix has agreed a $72bn (£54bn) deal to secure Warner Bros Discovery's film and TV studios and supercharge its library through rights to top franchises including Harry Potter and Game of Thrones.