This information is kindly supplied by ARMA:
This guide is for leaseholders thinking about appointing and employing an agent to manage their building. It's particularly relevant for directors of resident management companies and right to manage companies.
It explains the benefits of using a professional managing agent, how to go about appointing one and what you can do to get the best out of them.
There's also a useful checklist of questions to ask prospective managing agents, a sample tendering letter and a summary of services you may require.