2018
£m
2017
£m
At start of the period0.70.1
Recycled to retained earnings(0.3)
Purchase of own shares0.6
At end of period0.40.7

The own shares reserve represents the cost of shares in Dechra Pharmaceuticals PLC purchased in the market and held by the Group's Employee Benefit Trust to satisfy options under the Group's share options schemes (see note 28 for details). The number of ordinary shares held by the Employee Benefit Trust at 30 June 2018 was 21,033 (2017: 42,066).