Yes this looks like Steatoda nobilis. Generally these probably have a life cycle of one year, with eggs hatching to adult happening in one year, but this is certainly one of the spiders which can live for several years in some cases.
As it states on the forum page, you will find some helper toolbar buttons in the add post and post editor, as well as your most recently uploaded pictures as toolbar buttons. Click on the toolbar picture to add it to your post. I will add this text to the Add Post page as well.
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