Diligence / failure to ensure response to INZ letter / adviser supervising provisional adviser / provisional adviser not named in client agreement / complainant advised by provisional adviser, who went on leave pending INZ reply to extension request / complainant’s visa declined / failure to engage with complainant / failure to update complainant / complainant not told of PPI letter / failure to provide full copy of file when requested / Code of Conduct 2014, cl1, cl2a, cl2e, cl19a, cl19c, cl26b, cl26f / Immigration Advisers Licensing Act 2007, s422 / adviser not professional or diligent in following up & failed to respond to PPI letter / should have met with complainant and provided updates / complaint upheld