I am applying for a joint PhD program I have the to choose 2 out of 4 countries where I can do my PhD

France, UK, Belgium and Spain.
Now If i take the PhD with France as my host country and do my second half in the UK how will I be taxed?. will i be exempt from taxes as it is a PhD salary?

Is there anyone with experience with EMJD (Erasmus Mundus joint doctorate)programs?

I'm not entirely sure... but UK PhD students are non-tax payers as the money we receive is classed as a grant rather than a salary.