Someone born in March 1976 would be 5 in March 1981, meaning that they'd enter Year 1 in September 1981 (after being in 'Reception').
So he started the last year of compulsory education (Year 11) ten years later, in September 1991, meaning that he left school in 1992.
I can't provide the exact start & finish dates for each section of his schooling because, for example, in some parts of the country young people transfer to secondary school in Year 7 (after junior school), whereas in other areas secondary schooling doesn't start until Year 8 or Year 9 (depending upon the type of middle school system in that area).
Chris