The BBC report:

Sea lions at a zoo in Bedfordshire suffered eye problems after a new water filtration system was installed.

Whipsnade Zoo’s five Californian sea lions had been temporarily housed at London Zoo while their pool was refurbished.

But when they returned the increased chlorine levels hurt their eyes, an inspection report from March 2012 has revealed.

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I am a journalist and author. I am a staff writer at the UK edition of WIRED magazine and in 2015 my book, Freedom of Information: A Practical Guide for UK Journalists, was published. I created FOI Directory in 2012.