Thank your god, this is not as hard as installing Eduroam on Arch Linux. First, you need to download all the necessary files (the certificate, your user's certificate and your user's key from the UM website; IT Support » Manage IT Account » VPN Access » Download your VPN configuration files).

Then it should be “relatively” straightforward. From Network Manager » VPN Connections » Configure VPN. THe main configuration screen should look like:

There are a few gotcha's which you need to address. First, from your configuration files /etc/NetworkManager/system-connections find the config file and under the [vpn]] section add tls-cipher=DEFAULT:@SECLEVEL=0