Ahavuye isanamu, Getty Images Insiguro y'isanamu, Umushikiranganji wa mbere w'u Beongereza ,Boris Johnson Brexit yatumye abashikiranganji ba mbere babiri bose batanga imihoho, uwa mbere akaba ari David Cameron yatanze imihoho iyo kamarampaka ya 2016 kuri Brexit iheze.
