Robertson v British Gas Corp [1983] ICR 351 is a UK labour law case concerning the contract of employment.

The bonus provisions were apt for incorporation into individual contracts and thus required the employees' consent to be withdrawn.

A bonus scheme for British Gas employees was fixed by collective agreement.

Second, if the collective agreement was varied it had no effect on individual contracts.

‘This was another way of saying that the terms of the individual contracts are in part to be found in the agreed collective agreements as exist from time to time…’ Third, the approach to treating an employer’s statement as merely evidence of the contract’s terms, seen in System Floors (U.K.) Ltd v Daniel[1] was approved.