In August 2013, Winston bought 8,000 shares in Hexico plc for £24,000. In October 2020 Zardac plc made a takeover bid for Hexico plc, offering the Hexico shareholders three shares in Zardac plus £1 in cash for every two Hexico shares. The offer was accepted on 29 October 2020 when the market value of shares in Zardac plc was £5 per share. Compute Winston's chargeable gain.