I'm toying with moving up to 10k but not sure I can fit in the time. If C25k needed 3 sessions of half an hour a week does 10k need 3 runs of an hour? In reality I need an hour slot for 5k by the time I get ready and then shower and recover at the end. At the moment I'm only managing to run at the weekends and don't think I can find a lot more time than the odd hour during the week.
Writing this did put me in mind of the Fawlty Towers episode where Basil asks the doctor couple "How often do you manage it?"!