So that's what SWA cable looks like. Is the jacket XLPE too? http://www.tlc-direct.co.uk/Main_Index/Cable_Index/Armoured_SWA/index.html

What is regulation burial depth for SWA?

I don’t think the US has an equivalent to the gasketed direct-burial splice boxes. http://www.tlc-direct.co.uk/Main_Index/Cable_Accessories_Index/Cable_Joints_1/index.html

The striped tape is cool! I know places where that tape would give a US inspector convulsions. http://www.tlc-direct.co.uk/Products/TLTAPEGY.html