Serious incidents have occurred where inflatables have collapsed or blown away in windy conditions.
The link below gives you access to a guide that suggests simple precautions that can help you avoid serious incidents, whether you supply or buy bouncy castles and inflatables, are hiring one for an event, or operate them.
Health and safety law applies to the supply, hire and use of inflatables for commercial purposes. It does not apply to private, domestic buyers and users.
This guidance applies to inflatables devices used both outside and inside.