If you buy a Roller, Venetian, Wooden, Roman or Pleated blind with cords, your Hillarys fitter will also install a discreet little cleat or hook for the cord to wrap around, so there are no loose strings. Cleats are fitted at a minimum height of 1.5m above the ground, whilst hooks at fitted to ensure the chain is sits taught - this positioning will vary depending on blind and window size.
Having a safety device is now a legal requirement even in homes without children, as little ones may visit you from time-to-time. In fact, if you move home and leave your blinds, you have an obligation to make sure they are safe.
With certain blinds, you can order a special kind of breakaway device that will pull apart with excess force. The good news is that they are easy to reassemble if pulled apart by accident.