It's not just child-proof, but has the following properties too:

• The competitively priced quality socket outlet rail for DIY, home and office
• Prevents damage or destruction from voltage peaks, and provides effective protection against indirect lightning strikes
• Suitable for wall fixing. With 2 m cable with BS-plug 13 A
• Equipped with an illuminated on/off switch and surge neon indicator
• A light indicating surge voltage is active
• Cable: 05VV-F 3G1,25
• Nominal current: 13 A
• Plug: 240V, BS 1363