His father changed the family surname to Germain in 1770 and was created Viscount Sackville in 1782.

In 1821 he was sworn of the Privy Council and appointed Master of the Horse under Lord Liverpool.

[1] Serving in that office until 1827 and again briefly under Sir Robert Peel from January[2] to April 1835, he was also appointed a Knight of the Garter in 1826.

His memorial is in St Peter's Church, Lowick, Northamptonshire – a black lettering-etched white marble chest-tomb by Richard Westmacott, large draped mantle, coronet on cushion with a human-size angel seated alongside, its only coloured feature is its shield.

Charles had succeeded in 1785 to the vast bulk of the parish of Lowick, including the grand 13th-century-core Drayton House, replete with three towering eagles on top of its bulky gate posts.