An agreement by the European Parliament to retain fixed pack sizes for milk could still be thrown out.
MEPs approved a European Commission plan to abolish prescribed pack sizes for food. But they voted to keep them for milk, butter and bread, safeguarding the pinta.
Lengthy negotiations will now begin between the Parliament and the Council of Ministers to agree on what form the new law should take.
The Council could still insist on wholesale liberalisation of food packaging. If this happens, retailers will be