Data from surveys of members: proportion of portfolio which is made up of investment property -- Number of purely investment properties managed -- Average value of BTL properties -- Average rental return -- Average void period per year -- Number of new tenancies (not renewals) signed up in the last three months -- Balance of supply and demand in rented residential property sector -- Average length of continuous stay in property -- Change in achievable rent levels -- How are landlords currently acting over their net investment in residential property

Data from Surveys of Landlords: Average age of respondents -- Average length of time respondents have been residential landlords -- Average number of residential properties in portfolios -- In the next twelve months do you expect to sell some or all of your let residential properties -- Average number of years since respondents first became a landlord -- Average life expectancy of respondents property investment -- Why did you first decide to invest in residential property -- If house prices were to fall, would you sell your residential property investments -- Do you expect/anticipate that you will acquire further (buy to let) investment properties during the next twelve months? -- Irrespective of the length of any initial fixed term, on average how long are the same tenants staying continuously in the same property

Detailed statistical report produced by the Association of Residential Letting Agents (ARLA) and buy to let mortgage lenders compiled from quarterly reports detailing a range of financial trends, along with opinion from those surveyed with regard to buy to let investment.