Maybe you have to try a small wooden wedge then between the back of the trigger and the trigger guard. Dry fire it first, wedge the trigger forward, #### it by lifting of the bolt, and withdraw the bolt. I think the Majestic was just a grade up from the Monarch.
In Frank deHaas 3rd Edition of Bolt Action Rifles, he lists, the BSA Royal, Majestic, Monarch, and Herter's U9.
In reading his description, it appears that you might have to pull on the trigger while cocking. "When the striker is down, pulling on the trigger causes the bolt-stop to remain down so the bolt can be opened and withdrawn."
The book is over one inch thick. Short of cutting the pages out to photocopy them properly . . . but I would do that if need be.
It appears BSA made changes, modifications, and improvements.
The Royal came out about 1954, and a medium action came out in 1956. The long action in 1957. There was an improvement in 1959 (called the Majestic)and in 1960. The Monarch was introduced in 1966, and in 1968 the intergral scope mounting bases were dropped. He then describes a method of removing the bolt by raising the bolt handle and pull the bolt halfway back, press forward very hard on the trigger, and while holding this pressure, pull the bolt out. The instructions I was given earlier was given to me and demonstrated by a gunsmith.
My Monarch, while sold, is waiting on the buyer completing the registration. It is sealed in a shipping box. As a courtesy to him, I will cut the pages from this book, photocopy two sets, and you can have the second set. Unfortunately, it will not happen tonight, and I "just have to" golf tomorrow.
Mel