Translate the following English sentence to French:
"To make it very clear also to Mrs Isler Beguin that means that what was written in the common letter by Mrs Bjerregaard and Mrs Wulf-Mathies is still valid."
Je voudrais également dire clairement à Mme Isler Béguin que cela signifie que la lettre commune de Mme Bjerregaard et Mme Wulf-Mathies est toujours valable.