No, I'm sorry Ewan, but that's credulous nonsense.
As a specialist journo, you could quite easily follow this and find out the truth, which the Guardian blokes have signally failed to do.
This was a Government to Government deal, and all payments via BAE (BAE was a conduit, not a source) were approved by HMG.
BAE has tried (not always successfully, but it has tried harder than any other aerospace manufacturer I can think of) to draw a line between bribery and the kind of practises that are acceptable and legal routine in the Middle East.
That there is no connection between Al Y II and the Typhoon deal.
The Guardian has an agenda on this, and has stooped to dirty tricks of its own in its attempts to smear BAE Systems. Posing as official investigators and distributing 'fake' business cards with an address which turned out to be the Guardian's old archive was the tip of a shameful iceberg.
Its journos have behaved disgracefully, and with great partiality and have reflected great discredit on the profession that you and I follow.