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Retirement plans (Tables)
9 Months Ended
Oct. 28, 2023
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The components of net periodic benefit cost for the Pension Scheme are as follows:
13 weeks ended39 weeks ended
(in millions)October 28, 2023October 29, 2022October 28, 2023October 29, 2022
Components of net periodic benefit cost:
Interest cost
$ $— $ $(0.9)
Expected return on plan assets
 (0.3)(0.9)— 
Amortization of unrecognized actuarial losses (1.0) (3.0)
Amortization of unrecognized net prior service costs (0.1) (0.3)
Pension settlement loss — (0.2)(132.8)
Total net periodic benefit cost
$ $(1.4)$(1.1)$(137.0)