Have you ever gone to run a bath and found one of these sitting waiting for you............?
I'm sure you know of this already, but just in case here's what to do........
Place a large glass (pint size is best and if you are really squeamish one with a handle!) over the spider.
Lift glass - not too much as to let the spider out and slip a piece of card between spider and bath
Flip over glass hold tightly to glass and throw the spider out of the window shouting GERONIMO!
or
Walk to the bottom of the garden and let it free there!
