There are of course rules and guidelines for PhD by publication and each university may differ in these. Essentially, the same criteria apply for a traditional PhD in that the work needs to be coherent and significant. However, in no way are these aspects discriminatory and as long as you can fulfil the criteria then you should not have any problems.

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Anyone else any question?

There are many UK Universities that do a PhD by publication and if you did a google search you would find them and can include the likes of City Uni, UEA, Sunderland, Kingston. Even Cambridge has one by 'special regulation' but only offered to its own grads. Its not hard to find them, but it is hard to complete the works. Naturally people are sceptical but its as valid as the traditonal route and perhaps less costly.

Im currently enrolled on a PhD based on published work. If you dont get anywhere with the traditional PhD try considering this route which is more self-motivated and enables you to complete your PhD in less than a year at a reputable University while also getting yourself published.