Nearly a quarter of the A* grades achieved this year went to pupils in the South East.
Statistics show that pupils in this region are gaining more than their share of the highest grades.
The South East has 19% of A-level entries, but accounts for 23% of A* grades given out, according to this year's A-level results.
London for example has 15% of entries but has achieved 17% of top grades, while the Eastern region has 12% of A-level entries and 13% of A*s awarded.
In contrast The South West was responsible for 10% of A-level A*s and 10% of entries.
Other parts of England had a smaller proportion of top grades compared to the number of entries.
More top news
Tonight turning foggy in places but frost free
Governor says Article 50 fears not Bank actions to blame for pound's plunge, but admits markets may yet have "mistaken" Brexit impact.
Conservative MP Zac Goldsmith read out a statement on his decision to force a by-election in protest at new runway at Heathrow Airport.