We have had clients in the past who had a visa denied by the U.K. but subsequently were granted a U.K. visa successfully. The initial U.K. visa denials were for similarly innocuous reasons as the one you describe. In those cases, the initial denial posed no issue for the citizenship approval. The client had to provide a certified copy of the most recent visa obtained from the U.K. If you have been refused a U.K. visa and have not subsequently re-applied successfully, this is more of a flag for the citizenship-by-investment unit. You would need to show evidence that the visa was denied due to an error in the application form, and no other serious reason, and it would be at the discretion of the citizenship unit whether they would approve you. That said, they certainly review all applications with a measure of common sense and the fact that you subsequently successfully obtained a visa leads me to believe that this would not necessarily scupper your application, assuming all other documentation passes due diligence. Out of an abundance of caution, it would be ideal if you re-applied in the U.K. successfully before making the citizenship application. If you were our client, we would approach the unit with your specific case with documentary proof to request specific feedback before making the application.
