Sirius Minerals, the potash company which is developing a mine in a national park in North Yorkshire, says it has received approval for all outstanding drilling applications on the site, bringing the total to six.It also says early buying of components has reduced the initial budget for the project.Drilling has already begun in North Yorkshire and Sirius believes it is on course to hit mineral deposits within 10 days.Chris Fraser, Managing Director and CEO of Sirius, said: "We are pleased with the progress on this important drilling programme and continue to work as quickly as possible to complete this phase of the project. We have already established good working relationships with our key contractors and will continue to keep the local community updated."Sirius Minerals' share price rose 2.4% in early trading.BS