On the iPhone/iPad/iPod Touch go to Settings> General > Network
On the Network settings page scroll down to the bottom and select the VPN button.
Configure a new VPN connection by selecting the Add VPN Configuration... option.
You should see the VPN information page. Ensure that you have chosen L2TP connection.
Fill out the fields with the information below:
Description: MyExpatUK (this can be anything you like)
RSA SecureID: OFF
Send All Traffic: ON
If you have signed up for another country service you need to set the VPN server address to be:
US Service = vpn.my-expat-network.com
Canada Service = vpn.my-expat-network.ca
Australian Service = vpnau.my-expat-network.com
Once you have entered all the required details, select Save in the top right of the screen.
You may have noticed that a new VPN option has appeared in your General Settings under WiFi. This is where you can turn your VPN connection On and Off.