1) Download the certificate from HTTPS Interception (aaat.uk) on your device.
2) When prompted click "Allow" followed by "close".
3) Navigate to the settings app -> General and then scroll to the bottom and select "Profile"
4) Now click on the entry entitled "smoothwall.stgeorge.internal" and then click on "Install" in the top right
5) Click "Install" again
6) Now Click "< General" in the top left and then chose "About" at the top
7) Scroll to the bottom and choose "Certificate Trust Settings"
8) Turn "smoothwall.stgeorge.internal" on.
9) Click on Continue and then you are done.