WITTMANN (UK) LTD v WILLDAV ENGINEERING SA
[2007] BLR 509
COURT OF APPEAL (CIVIL DIVISION)
Before Lord Justice Ward, Lord Justice Buxton and Lord Justice Moore-Bick
Guarantee - Effect of change in underlying contract - Rule in Holme v Brunskill - Whether guarantor must agree or communicate consent to change - Whether need for evidence in writing.