I&#x27;m the author of this blog post. And I don&#x27;t think the invitation was the main issue here. I did have a ticket, and I wasn&#x27;t visiting any friends there who could invite me. Also I haven&#x27;t been asked about the invitation letter during the main interview, I haven&#x27;t even been asked why I don&#x27;t have it or anything like that...<p>I think the main issue was my not permanent employment, here, in the UK. I just don&#x27;t like the way the officer was interviewing me.