Boris Johnson gives PM May advice on Brexit while parading loyalty

By William JamesMANCHESTER, England (Reuters) - British Foreign Secretary Boris Johnson offered Theresa May unsolicited public advice about how to make Brexit a success on Tuesday, delicately testing the extent of the prime minister's weakened authority while pledging overt loyalty.Alongside public proclamations of backing for May, he used media articles and interviews ahead of the Conservative Party Conference in Manchester to offer up his own vision of a bold Brexit."The whole country owes her