The Russian lovers, known only as Artem S and Anna D had only been seeing each other for a few months when the tragedy happened.

The pair had been at Artem’s family home in Russia, but had told his parents they were going out for a walk.

Artem, 18, took 20-year-old Anna to a lock-up garage where he had been renovating his beloved old Skoda Felicia car. Police believe the pair turned on the car’s ignition so the heater could stave of the freezing temperatures as they made love.

Artem’s family became worried when they did not return and went out to search for the couple. They found the lovers unclothed in each others’ arms in the Skoda. Artem was about to graduate from catering college but dreamed of opening his own garage repair shop.