How do I add a Snapchat widget to my lock screen on iOS?

To add a Snapchat widget to your lock screen on iOS

1. Long press anywhere on your lock screen and unlock your device.
2. Tap 'Customise
3. Tap the space above or below the time.
4. Scroll down to "Snapchat"
5. Tap an option to add it as a widget to your lock screen