<sod >The Prime Minister, speaking on a visit to Portugal, said Britain "will act with our head and our heart" to help solve the growing humanitarian crisis stemming from the four-year civil war in Syria.< eod>< sod > The Prime Minister, speaking after a meeting with the Portuguese Prime Minister in Lisbon, said Britain "will act with our head and our heart" to help solve the growing humanitarian crisis stemming from the four-year civil war in Syria.< eod>