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Barrow Museum
You have some really good and well-presented Yorkshire coast material here.  All the ammonites and belemnites are from the Upper Lias, (or Whitby Mudstone Formation") which was deposited during the Toarcian Stage during the latter part of the EarlyJurassic.

One of the site's administrators, Andy S, will no doubt tell you the precise identity of each ammonite and add the link to his site.
Can you tell us from where you collected the coral and wood?  The "fern", by the way, is a piece of a large ammonite - your fragment showing the septal suture lines which are where the ammonite's "flotation chamber" walls intersect the outer shell.  These chambers are well displayed in the cross section you have found, in your third photo.
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