After you've done the Scilly sites you should get to Co. Waterford in Ireland where there are three Scillonian (I knew that, honest!) Entrance Graves (we called 'em "Undifferentiated Passage Tombs"). Even the associated finds are identical to the Scilly sites. Unfortunately, none of them are in their mound anymore so they look like this now ...
Harristown
http://www.megalithomania.com/show_site.php?site_id=343&image=862
Matthewstown
http://www.megalithomania.com/show_site.php?site_id=348&image=878
The other one is at Carriglong, but I've only been there when it's totally overgrown or lashing it down ...
http://www.megalithomania.com/show_site.php?site_id=345&image=867