Much depends on the point at which we decide that RP came into existence. William Gladstone, who was PM for four different terms in the late 19th century, went to Eton College yet his pronunciation gave away that he was from the North of England and his speech was criticised by RP speakers in the early 20th century.
Definition of vane. 1a : a movable device attached to an elevated object (as a spire) for showing the direction of the windb : one that is changeable or inconstant.
The definition of a goad is a stick with a pointed or electrically charged end that is used to move animals, or is something that urges someone to do something. An example of a goad is a tool used to drive cattle into a special area. An example of a goad is money promised to someone if they complete a certain action.