Shares in
subsidiary
undertakings
£m
Cost
At 1 July 2019755.8
Additions
At 30 June 2020755.8
Impairment
At 1 July 201912.2
Charge for the period
At 30 June 202012.2
Net book value
At 30 June 2020743.6
At 30 June 2019743.6

A list of subsidiary undertakings is given in note (xv).