It may not be generally accepted history. That does not mean it isn't true.
I don't think anyone (of whichever blue persuasion) would argue that the RN head-shed have covered themselves in glory throughout the JFH saga. However, as the RN no longer "owned" SHAR or it's budget, it could hardly stop retirement, without dismantling JFH and consequently disavowing "jointness".
As for blocking 801, I think there have been a number of debates on that in here, most of which centre on JFH mandating RAF manning / training quals, (despite FAA operating safety records), which the training system was not set up to deliver. So while perhaps not a "deliberate" block, an effective one nonetheless.