I've just had a reply from them on facebook, here you go:
Hello, thank you for contacting us. We understand your concern, but there is no need to worry as this is a USA/Canada specific requirement.
A correctly installed monitor poses no risk to your baby. It is important to ensure that the nursery unit is at least 3 feet (1 metre) away from your baby’s cot and that all cords are kept well out of reach of your baby. The instruction manual clearly shows you how to set up your monitor correctly.
If you would like to have further assistance with regards to the correct installation of your Angelcare baby monitor, please contact the UK Baby Helpline on 0845 009 1789 (on weekdays between 10am – 4pm) or email [email protected].
Make of that what you will