The age of consent is 16 in the UK. The age of criminal responsibility in england-and-wales and northern-ireland is 10, and 12 in scotland.
Given that the age of consent is the age at which an individual is deemed legally competent to understand the notion of consent - without which they cannot knowingly engage in a non-consensual act - how is it possible for anyone under the age of 16 to be prosecuted for rape?
(Granted it can be argued that a person understands consent with regards to others first and themselves second, but that would likely run counter to Theory of Mind and developmental psychology as a whole!)