The Welsh dancer will be formally made a Member of the Order of the British Empire (MBE) for services to fundraising and raising awareness of inflammatory bowel disease, while Sir John will receive a knighthood for services to music in a ceremony on Tuesday.
More recently, the first two choral items sung at the late Queen’s platinum jubilee national service of thanksgiving in June 2022 and six pieces performed at the coronation of King Charles were arrangements by Sir John.
Among other recipients due to be honoured on Tuesday are Jasvinder Sanghera, who will be made a Dame Commander for services to the victims of child, forced marriage and honour-based abuse.
In 2023, the dancer was diagnosed with breast cancer shortly after coming back from her honeymoon with husband Ben Jones, and revealed in the 2024 BBC documentary Strictly Amy: Cancer And Me that she has frozen some embryos.
Strictly Come Dancing professional Amy Dowden and composer John Rutter are among those set to be honoured by the King at Buckingham Palace.