Gig Info &c
I am sorry if our website sends you to pages that you cannot view.
I'm semi-seriously starting to consider omitting the facebroke link on new pages.
It presents visitors with a demand to log in if you are not, and anyway often refuses to go to the linked page even if you are logged in. (Expletive deleted).
There clearly IS a way for fb users to arrange a page so that non-account-holder visitors do not get a banner obscuring the information, because numerous commercial sites have arranged their pages like this.
Most of the pages that I want to make a link to have not acquired that facility.
I notice that some of the links are starting to be broken anyway, and we get redirected.
Technophobe Geoff Spring 2017 [with slight edit 2019]