"... Oliver and the cases which follow it show that an interval or interlude in an overall period or episode of work will ordinarily be seen as being part of the course of employment if the employer, expressly or impliedly, has induced or encouraged the employee to spend the interval or interlude at a particular place or in a particular way. Indeed, the modern cases show that, absent gross misconduct on the part of the employee, an injury occurring during such an interval or interlude will invariably result in a finding that the injury occurred in the course of employment. Accordingly, it should now be accepted that an interval or interlude within an overall period or episode of work occurs within the course of employment if, expressly or impliedly, the employer has induced or encouraged the employee to spend that interval or interlude at a particular place or in a particular way. Furthermore, an injury sustained in such an interval will be within the course of employment if it occurred at that place or while the employee was engaged in that activity unless the employee was guilty of gross misconduct taking him or her outside the course of employment."