The first chart shows the proportion of housing owned and rented in 1985 while the second chart gives information about the percentage of private and rent accommodation in 2005.
Don't make your introduction too complicated.
The pie charts compare house ownership and renting in the UK in 1985 and 2005 in percentage terms.
In general, most of people prefer to stay at the privately owned housing than live in social housing. Perhaps social housing has limited facilities which make people uncomfortable meanwhile private house is the appropriate place for inhabitants.
You don't need to give a reason for the main features of the given graphs.
Overall, there was in increase in the total number of homes in the UK over the two-decade period. Likewise, privately owned houses were the most popular type of housing.
As seen , in the 1985, more than 50 percent was occupied by private housing and came to second council rented over than quarter.
In 1985, private houses accounted for over half of the total number of homes (22 million), which was about 20% higher than the second most common type, council rented houses.