After all, nothing says Yuletide like two giant illuminated leopard slugs outside a major London gallery. Measuring more than 10m (33ft), the mighty molluscs will remain in situ until 25 February.

However, according to BBC's Countryfile, there is one variety of slug that should be left undisturbed. Leopard slugs, named for their distinctive spotted markings, do not consume living leaves but ...