Twins Emma and Katie Phipkin, 16, left, top, were celebrating last night after both scored straight A and A*s.

Despite both the Headington School pupils securing outstanding results, Emma earned the bragging rights over her sibling by getting straight A*s across the board.

Emma was among seven girls at the school to achieve straight A*s, with more than 50 per cent of all passes at A* and more than 86 per cent at A and A*.

Headteacher Anne Coutts said: “This year group have been so hard-working, and I’m so proud of them – they deserve everything that they have achieved. This is another set of fantastic results.”

Mansi Amin, 16, of Swinburne Road in Iffley, was the top-scoring pupil at Oxford School, landing 6 A*s and 4 As.

The Indian-born teenager plans to go to the Cherwell School to study biology, chemistry, maths and Spanish at A-Level.

She hopes to read medicine at university.

She said: “I’m on top of the world, all my hard work has paid off. I was speechless when I opened my results; it’s gone better than I could have dreamed.”