Distributed simulation (DS) is the concept of high-fidelity immersive simulation on-demand, made widely available wherever and whenever it is required. DS provides an easily transportable, self-contained `set for creating simulated environments within an inflatable enclosure, at a small fraction of the cost of dedicated, static simulation facilities. High-fidelity simulation is currently confined to a relatively small number of specialised centres. This is largely because full-immersion simulation is perceived to require static, dedicated and sophisticated equipment, supported by expert faculty. Alternatives are needed for healthcare professionals who cannot access such centres. We propose that elements of immersive simulations can be provided within a lightweight, low-cost and self-contained setting which is portable and can therefore be accessed by a wide range of clinicians.