Sorry F5 but your last post strongly suggests that you've made some wrong assumptions here.
As it happens, I fully support legal falconry and have many friends from that sphere of life. Some are so committed that they spend more time with their hawks than they do with their wives.
It is these individuals, not the RSPB, who have not only stated but also demonstrated to me in the hunting field why these two species (ie. Goshawks and Peregrines) are so highly valued as trained hawks. I feel extremely fortunate to have been invited out hawking with some truly skilled falconers and austringers, including one or two 100% genuine 'old school gentlemen' types who've never bought or sold a hawk in their lives.
The thrust of this thread is about Goshawks and where to go to observe them performing their fabulous aerial displays. I agree wholeheartedly with Rob and Robin and would urge extreme caution to anyone considering posting detailed locations, except in the case of the few well known and well protected sites.
Regrettably, Goshawks (and Peregrines) are at real risk from a range of human related pressures, eg. renegade Pigeon Racers, misguided Gamekeepers, Egg Collectors, outlaw Falconers and wannabe Hawk Keepers, skint lads who've heard or read in the media that every chick is worth ten grand, over zealous Birdwatchers and similarly afflicted Photographers, etc. etc. Most of the people in all these groups (except Egg Collectors) are sound, sensible and law-abiding but, as is always the case, there are a few bad apples in every barrel.
The fact is that most birdwatchers go out at the weekends when the weather is nice. That's not meant to be critical in any way but those with nefarious intent do exactly the opposite. They visit nest sites at night, in the early hours, in bad weather, in fact any time when they anticipate no one will be around to see them. So very few general birders ever witness these activities first hand. Out of sight is out of mind as they say. So if birders don't see these risks then most won't be inclined to consider them too seriously, so they won't see any problem with sharing detailed nest site information with anyone, including by publishing it on the web on Forums like this.
The fact is that these risks are real and present. I've witnessed first hand the loss of a significant number of active raptor nests through human interference. On most occasions, these situations have been discovered afterwards but careful investigations have revealed rope burns on rocks and trees, freshly broken branches, traces of muddy boots on limbs, the tell tale signs of climbing irons, etc. etc. For sure these weren't caused by Foxes or Buzzards or other 'natural causes'. And I've also personally intercepted individuals intentionally and unintentionally breaking the law, including those involved in stealing eggs and young for falconry purposes. All the evidence that I've collected has been reported to the appropriate authorities and I been subsequently called as a witness in Court to testify on a number of occasions.
In summary, I wish to strongly urge all those who are fortunate to visit or discover the nest of Goshawk, Peregrine or any other raptor to
think very carefully before you betray the secret of the birds that you've so much enjoyed watching by telling anyone about it.
Great raptor watching to all, including those who expend care, time and effort orchestrating hunting flights for their trained hawks.