Cardiff North MP Jonathan Evans said "we should be replacing experimentation on animals with as many alternatives as possible", and called for action to make steps in that direction.
He said "there should be much more done" by the research and the pharmaceutical industries "to ensure we cut down significantly on the number of animals that are used."
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Mostly dry tonight with some lingering cloud around.
Bronwen Williams, 11, and her two brothers, aged 15 and 17, are all under the legal voting age in the UK.
Hundreds of people took part in a protest march in Haverfordwest today over changes to hospital services.