The following is from www.walesonline.co.uk/news/uk-news/british-honours-system-how-work-22614269 It all sounds pretty open and balanced to me, with a lot of people and discussions involved in decisions. I can't really see Prince Charles having much influence on who gets chosen, without it being obvious that he is playing favourites. But hey! why bother looking at the procedure when we can just blame someone in a family we disapprove of?
How are people nominated for honours?
Any member of the public or an official body can nominate someone for an honour.
UK nationals and citizens of 15 Commonwealth “realms” of which the Queen is head of state are eligible for nomination.
People living or working overseas, whose achievements were made in another country or in the UK and have a significant international element, can be nominated too.
Nominations are submitted to the Cabinet Office’s Honours and Appointments Secretariat, which oversees the honours system.
Someone who has made an exceptional contribution to the response to the coronavirus crisis in the UK can also now be nominated.
Non-British or Commonwealth country citizens can be considered for “honorary” awards.
Who approves nominations?
Consideration of nominations can take 12 to 18 months.
The suitability of nominees submitted to the Honours and Appointments Secretariat is established through “merit” and “probity and propriety” checks.
This vetting process, to avoid bringing the system into “disrepute”, can involve the input of government departments, regulatory bodies, professional organisations, HM Revenue and Customs and the ACRO Criminal Records Office.
A group of 10 independent honours committees, each covering a specialist subject area such as sport or health, consider nominations.
The recommendations of these groups of independent experts and senior civil servants are passed on to the Prime Minister and, ultimately, the Queen for approval.
The Foreign, Commonwealth and Development Office (FCDO) oversees the Diplomatic Service and Overseas List.