Arms firms in Scotland are failing to make human rights checks which could prevent their products from being used in potential war crimes.
Arms firms due to attend a trade event dubbed a “festival of violence” gave MP's more than £60,000 in donations.
Bombs and missiles will still be exported to Saudi Arabia under a secretive licensing system despite a court ruling that UK arms sales are illegal.
Arms firms supplying weapons for the war in Yemen that has killed 70,000 people were handed nearly £3m by the Scottish Government last year.
Investments worth nearly £130m were made in arms firms linked to Yemen's conflict, which has left an estimated 70,000 people dead.
Leonardo, an Italian arms firm linked to ethnic cleansing in Syria, has visited Scottish schools at least 17 times over the last two years.
Arms firm Raytheon, which has been linked to alleged war crimes in Yemen, taught in schools on 81 occasions over the past two years.
BAE Systems has visited more than 400 schools across the UK and produced lessons for children.
Glasgow City Council removes its logo from a controversial arms fair - but keeps backing the event.