"Mr Colen was entitled to the total commission and Mrs Colen had no claim on that sum."
"The commission was changed so that the Colens and Percivals each received 5% of all sales."
"In 1988 the commission system was changed again with Mr Colen and Mr Percival each taking 10% on their own sales. The purpose was to increase their own motivation."
"A scheme is not necessarily unlawful because its only purpose is to reduce the amount of lawful deductions that ought to be paid to the Inland Revenue or the Department of Social Security. That is the purpose of all legitimate tax avoidance schemes. If the scheme was entered into in good faith and was a proper method of reducing tax open and above board which either had been or would be disclosed to the Revenue, there is nothing unlawful about it."
"In cases where the contract of employment is neither entered into for an illegal purpose nor prohibited by statute, the illegal performance of the contract will not render the contract unenforceable unless in addition to knowledge of the facts which make the performance illegal the employee actively participates in the illegal performance. It is a question of fact in each case whether there has been a sufficient degree of participation by the employee."
"Where an employee agrees to be paid according to a scheme which is devised to avoid or at least to postpone the proper payment of income tax, the contract of employment is an illegal one which the courts will not enforce. Ignorance of the illegal character of the agreement does not prevent the application of the ex turpi causa rule."