SY - My case was not part of a "greed machine" invented by Mrs Thatcher, although I did invest the most I thought I could afford because I wanted to live in the best house I could. After that experience I decided not to treat my home as a financial investment, just as an investment in my own future security.
Regarding repossessions - tenants of BTL investors are apparently protected by having an Assured Shorthold Tenancy and will not suffer eviction if their landlord has defaulted on the mortgage payments. (The Council of Mortgage Lenders has issued guidance on this - http://www.cml.org.uk/cml/policy/issues/5002).
Tenants of landlords who are not supposed to let their properties under the terms of their mortgage are also now protected to a certain extent through the Mortgage Repossessions (Protection of Tenants) Act 2010.