The decision to stop breeding guinea pigs for experimentation at Darley Oaks Farm in Staffordshire is considered by many of Wednesday's newspapers.
The Independent says it is a success for animal rights protesters after eight years of violence.
A spokesman for the animal rights movement is quoted in the Daily Express as saying they can now focus their attention on other operations.
But in the Daily Mirror the Research Defence Society vows to keep testing.
For once the Sun and the Daily Mirror see eye-to-eye, expressing their surprise at former Tory chancellor Ken Clarke's change of heart on the euro.
The Mirror argues that Mr Clarke was either "wrong on a fundamental issue or is selling out to buy votes in the battle for the Conservative Crown".
The Sun's political editor, Trevor Kavanagh, says Mr Clarke wasted 20 years supporting the euro.
He says his change of heart is to coincide with the leadership campaign.
The latest immigration figures lead the Daily Express to explain "How Britain Hands Visas To Bombers".
The paper says thousands of potential terrorists from Algeria and Pakistan were just "waved through" without checks, when they arrived in the UK.
The Sun says the "scandal" of "no questions visas" invites terrorism.
Meanwhile, the Guardian says the 7 July bombs were manually detonated by the men carrying them, scotching the theory they were duped into taking part.
The Daily Telegraph criticises pressure groups who, it says, are exploiting the death of Stockwell Tube shooting victim Jean Charles de Menezes.
It says they are using his death to attack the police and the government.
Writing in the Independent, the ex-minister Frank Dobson criticises the failure of the police to tell the public the facts of the shooting.
He says their stance undid the brilliantly successful work they had done up until that point.