"2. … The letter informed him that the starting salary for his job as line information assistant was£22,304 , and that: "in addition to your contractual salary of£22,304 , the post of line information assistant attracts a 15% unsocial hours allowance (£3346 per annum). This allowance does not affect the protection of earnings calculations shown above."
"5. A number of jobs undertaken by the Respondent's employees attract an unsocial hours allowance. For many of these jobs the allowance is not separately expressed, but is included in the salary. For example, as Mr Kieran stated, the train operator's salary includes an unsocial hours allowance. For historical reasons, the unsocial hours allowance paid to line information assistants has not been integrated into the annual salary. However, it is not a separately negotiated allowance. It is expressed as 15% of basic salary, and automatically increases each time that the basic salary increases. Line information assistants receive pay including the unsocial hours allowance when they are on holiday and when they are sick. Working unsocial hours is an integral pat of the line information assistant's job. The line information assistants are obliged to work unsocial hours as condition of their employment."
"6. In August 2001 the Applicant successfully applied for promotion to network control centre operator. This is a managerial grade post. The Applicant received a letter of offer of appointment dated7 September 2001 , to take effect on 2 October. At that time, the Applicant's annual salary as a line information assistant, including the unsocial hours allowance was£28,124 per annum. The letter of offer of appointment to the network control centre operator job was on a starting salary of£25,678 per annum."
"… I would like to explain how your salary for your salary for your new post as a NCC operator has been calculated. Your previous annual contractual salary for your position as a line information assistant was£24,456 , in addition to your contractual salary you were also in receipt of a 15% allowance for unsocial hours. When calculating your new salary London Underground Limited salary administration handbook states that staff being promoted from administration grades to operational manage grades Q3 level should receive a 5% increase or be put to the minimum of the salary band for that grade, whichever is the greater amount becomes your new salary. Your new salary of£26,705 is the minimum of the Q3 salary band range, as this figure is greater and 5% on top of your previous salary. Unfortunately the 15% allowance you receive for unsocial hours in your position as a line information assistant is not part of your basic salary, therefore could not be included in the calculation for your new salary."
"15. The Tribunal considered the status of the line information assistant unsocial hours allowance. We noted that it is not negotiated separately from the line information assistant's pay. Unsocial hours is an integral part of the line information assistant's job. The allowance is paid when the line information assistant is on holiday or sick. The Tribunal concluded that although the sum is expressed as a separate "allowance", in reality it is an integral part of the basic pay or salary of a line information assistant. We concluded that the starting point for calculating the Applicant's salary on promotion should have been his actual gross earnings as a line information assistant which were£28,124 at the material time."
"The Train operator's Salary includes already the unsocial hours allowance and is therefore already protected as your rostered earnings, Your rostered earnings as a Line information assistant is made up of your basic£22,304 +£3,346 unsocial hours allowance."
"5.3 INTERNAL PROMOTIONS 5.3.1 GENERAL It is normal practice for LU to grant a salary increase on promotion in accordance with the rules set out below…"