“(b) the fact that the requirements of that business for employees to carry out work of a particular kind in the place where he was so employed have ceased or diminished or are expected to cease or diminish, or

(c) the fact that his employer has decided to carry on the business with fewer or no employees, whether by requiring the work for which the employee had been employed (or had been doing before his dismissal) to be done by other employees or otherwise, or

(d) the fact that his employer has decided that the work for which the employee had been employed (or had been doing before his dismissal) should henceforward be done in a different manner for which the employee is not sufficiently qualified or trained, or

(e) the fact that his employer has decided that the work for which the employee had been employed (or had been doing before his dismissal) should henceforward be done by a person who is also capable of doing other work for which the employee is not sufficiently qualified or trained,”

“(4A) In ascertaining, for the purposes of subsection (2) (c), whether an employer has decided to carry on a business with fewer or no employees, account shall not be taken of the following members of the employer's family—

father, mother, stepfather, stepmother, son, daughter, adopted child, grandson, granddaughter, stepson, stepdaughter, brother, sister, half brother, halfsister.”.