SUBU, Colchester Zoo's last remaining lion, has been put to sleep.

The 20-year-old big cat had been in bad health for a number of days.

Tests last Thursday revealed he had been suffering from chronic active spinal arthritis.

Keepers decided the kindest thing was to put him to sleep.

The enclosure, Lion Rock, is now empty after lioness Leoni died of heart failure in October.

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