The analysis reveals an over-representation of the domestic cat's genes that are linked to immune function, such as the major histocompatibility complex, in the European wildcat's genome.

Five animals from the sanctuary had to be put down and 23 have since been rehomed.

This sparked a suspicion that the team was eager to confirm. Could it be a European wildcat? To find out, they contacted a wildcat rescue centre and consulted an experienced forester. Ultimately ...