the london mayor , pressed on his leadership ambitions by sky news anchor kay burley , insisted the position would not become vacant for five years .
but in his most candid remarks to date , he finally conceded : ` it would be a wonderful thing to be thought to be in a position to be considered for such an honour .
mr johnson , running to become mp in uxbridge and south ruislip , has long been tipped as a future leader of the party .