“The first Appellant had come to the United Kingdom with no expectation to remain in the country beyond the period of his studies. The first Appellant came to the United Kingdom at the age of 34 and therefore his private life outside the United Kingdom had been conducted very much longer than that concluded in the United Kingdom over a period of five and a half years. I concluded that it would not be a disproportionate interference with his private life for the first Appellant, together with his family, to be removed from the United Kingdom in pursuit of the public interest in immigration control.”