How to connect Meshtastic node to WiFi or WLan

I thought this should be easy but it wasn&quite straightforward. In case it makes a difference, my node has firmware version 2.2.23 installed on it. Be aware that if you enable wifi then bluetooth is disabled. You will lose the econnection to your phone. The serial connection via usb will still work however. For more info about Meshtastic activity in and around Brighton, UK see A much larger Facebook group is Meshtastic UK