Emma purchased an antique tapestry on 1 April 2003 for £12,500. The tapestry was damaged on 1 May 2013 when it was worth £30,000. After the damage the tapestry was worth £5,000. On 1 July 2013 insurance proceeds of £30,000 were received, which were not used to restore the tapestry.
Required: Calculate the chargeable gain and revised base cost in respect of the tapestry. (3 marks)