 In 1973, the Saudi government signed an agreement with the British government which specified BAC as the contractor for all parts of the defence system (AEI was previously contracted to supply the radar equipment and Airwork Services provided servicing and training).Overall spending by the RSAF was over £1 billion GBP.BAC, with the Lightning/Strikemaster contract; British Aerospace, with the Al Yamamah contracts; and most recently BAE Systems, with the order for Typhoon multi-role fighters, have all benefited from massive arms contracts with Saudi Arabia.