Accessible "Panic button"

Good morning,

NV Access were contacted by someone recently who is working on a website
for victims of domestic violence.  One feature of many such websites is a
"panic button" that someone browsing the site can press to quickly be taken
away to say a blank Google search page - Ideally, the panic button would
also be able to remove the site from the browser history.

The question to us (and which I'm asking here) is: How can such a feature
be made accessible and easy to use for screen reader users?  Ideally, with
a simple keystroke.

Is there a standard recommendation for these across the web?  (and is this
an appropriate question to ask here?  My apologies if not).

Kind regards

Quentin.

-- 
Quentin Christensen
Training and Support Manager

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