"The Damocles plot" appears only to be available on Kindle-which I don't do either, but I did use the services of a "book finder" some years ago, so if I can track him down (tho he's probably been put out of business by now by Amazon), I'll set him the task of finding a print version. I will revert if he/I succeed.
Ref the "Vickers Vibrator:" you're probably right Discorde, but from the perspective of a child (which I was when I flew several times on Vanguards in the 1960s), it always seemed to me to be a powerful, smooth, quiet, comfortable aircraft which, moreover, made a lovely "purring" sound both inside and out-I'm also a cat lover incidentally. And those huge windows were fantastic for a child!
To hear the sound of the Vanguard's Tynes again, click on this link: