G. PERCY TRENTHAM LTD. v. ARCHITAL LUXFER LTD. AND OTHERS
                                                                    [1993] 1 Lloyd's Rep 25
                                                                    COURT OF APPEAL
                                                                    Before Lord Justice Neill, Lord Justice Ralph Gibson and Lord Justice Steyn
                                                                    
Contract - Validity - Contracts for design, supply and installation of aluminium window walling, doors, screens and windows - Whether dealing between parties led to conclusion of binding sub-contracts.