Theo Fennell, jeweller to the celebrities, named former Burberry Group executive Pamela Harper as its new chief executive on Thursday as it experienced a 29 per cent rise in pre-tax profits driven by international sales.

The upmarket jeweller – whose customers include footballer David Beckham, his wife Victoria, singer Sir Elton John and actress Elizabeth Hurley – said international expansion following openings in Kazakhstan and Bahrain helped its results to sparkle.