Professor Dylan Jones is Pro Vice-Chancellor for Biomedical and Life Sciences at Cardiff University.
He told ITV Cymru Wales that the university's animal research procedures are strictly regulated, 'certainly not cruel' and play an important part in establishing ways to alleviate human suffering.
He conceded that the institution would like to reduce the number of animals used, but said it would be 'some time' before scientists could rely solely on other methods of testing, as some remain 'unsophisticated and unreliable'.
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The training centre and headquarters of Girlguiding Cymru in Powys, is laying claim to having the tallest living Christmas tree in the UK.
Cloudy with rain and strong winds, local gales along exposed coasts. Rain persistent across western hills, and becoming heavy later.
It will be cloudy with hill fog and mild overnight with increasing winds, with gales around southwestern coasts.