Yvonne made the following acquisitions of ordinary shares in Ranghi plc:

In January 2023, the company made a 1 for 5 rights issue at £1 per share and Yvonne decided to buy the shares which she was offered. In March 2024, she sold one-half of her shares in the company for £1.80 per share. Calculate the chargeable gain arising in March 2024, given that no further shares were acquired within the following 30 days.