Even if the Range Rover did get going, it wouldn’t be able to stop.
It’s very dangerous driving on summer tyres in those conditions.
Always fit tyres that have the 3PMSF (3 Peak Mountain Snow Flake) symbol if you are going to be driving in the snow. This symbol means that the tyres have been tested to have good traction in the snow. Compared to summer tyres, 3PMSF tyres will stop twice as quickly in the snow.