The Hilton Hotel in Syon Park, west London includes the Heliquarium, an enclosure that plays host to more than 1,000 butterflies.

The centre piece in the foyer of the luxury hotel, the Heliquarium harks back to the London Butterfuly House, once located in the Syon Park Estate.

The engineering challenge was to provide the high humidity the butterflies need in the foyer requiring much lower humidity levels.