Hi! It depends on your subject I would think. A distinction is definitely an advantage if you are applying for funding for your own project in a competitive field, but if you are applying for a project that already has funding or something in a less competitive field then it's probably less important. I know people who have got on an advertised funded PhD with just a pass at MSc level so I think you should be in with a chance with a merit and some relevant experience. Good luck, KB.