The Grocers' Company offered him the living of St Stephen Walbrook in 1953. He became rector of the church, designed by Christopher Wren, adjacent to the Mansion House in the City of London. The church was closed for structural repairs from 1978 to 1987. His son, Andrew, built chairs to replace its pews. Great controversy followed the installation of a large circular altar in travertine marble by Henry Moore, commissioned by Varah and his churchwarden Peter Palumbo. The matter was finally settled by the Court of Ecclesiastical Causes Reserved in 1987, which granted a retrospective faculty for its installation.