Where an employer makes 20 or more employees redundant at an establishment the employer must go through a collective consultation process.
It can easily be seen if you aggregate employees at a chain of stores the threshold will be quickly passed.
The Advocate General's Opinion in the Woolworth's case suggests one would not aggregate employees across a chain of shops or various offices of an employer to which employees are assigned.
Does the EU Collective Redundancies Directive 98/59 require that the numbers of employees dismissed across an employer’s various establishments be aggregated to see if the thresholds for protection under the Directive are met? No, says Advocate General Wahl in Usdaw & Wilson v Woolworths and others, giving the preliminary opinion on the reference to the ECJ from the Court of Appeal in the Woolworths case.