Calculating CGT on sale of jointly owned property when spouse dies 20 years abo

How is CGT calculated on a property that has been sold. Property was purchased jointly in 2002 for £175k. Wife died in 2004 and property valued £340k in 2005 for probate. Wife's share of property transferred to husband. How is "purchase" value of property calculated please?

Hi ,
 

As there is no income / capital gains tax liability from the transfer of assets between a husband and with, the 50% share is transferred at the acquisition cost.  This means the husband acquired the 50% share at the value paid in 2002.  He now has 100% of the property acquired at the value in 2002. Thank you .