The first thing to do is ignore what you have read on message boards, forums and facebook groups written by people that don’t know what they are talking about. Ravenwood Services have some great and very little known lenders that will consider lending to foreign nationals that hold tier two visas. Many of our lenders understand that people with a very skilled job are actually quite a low risk, but you have to know these lenders to understand the applicants they will accept. As a Tier 2 Visa holder its likely you have a good income or salary so affordability is less of a problem.
Ravenwood also have lenders that will do buy to let mortgages for skilled visa holders but they are keen for slightly higher deposits, the rates are still good.
Fortunately Paul knew exactly what he was doing and my mortgage is with a very mainstream bank at a great rate - much cheaper than renting