It is situated on a hill-top site near entrance to town, where in the past several tracks met.
The area began to be settled in the late tenth century: and St Swithun (Bishop of Winchester, 852–862) was the choice for church patron.
Near the entrance to the church, three stones mark the supposed ashes of Anne Tree, Thomas Dunngate and John Forman who were burned as martyrs on 18 July 1556 because they would not renounce the Protestant faith.
His son, Herbert Blakiston, went on to become Vice-Chancellor of the University of Oxford.
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