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Legal Update

English High Court provides guidance on the "reasonable endeavours" requirement

31 March 2017
Mayer Brown Legal Update
Endeavours clauses, such as the use of “best endeavours” (which imposes the highest duty), “reasonable endeavours” (a lower duty) or “all reasonable endeavours” (somewhere in the middle), are widely used in contractual arrangements. However, a party’s obligations arising from such clauses are often disputed.

In the recent case of Astor Management AG v Atalaya Mining plc, the English Commercial Court found that an obligation to use “all reasonable endeavours” to obtain a senior debt facility was legally enforceable. In reaching its decision, the court provided some useful guidance on how such endeavours clauses will be assessed by the English courts.


  • Ruth Malone
    T +44 20 3130 3207
  • Robert Hobson
    T +44 20 3130 3986
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