Lists, Lumps &.......Fishguard

Jon G. came back from a WRP meeting on Sunday, with the news that Pacific Diver has been split from Black Throated Diver by the BOU.
Presumably now the Llys-y-fran Pacific Diver will climb the remaining hurdles to join the Pembs list!

Whilst gaining Pacific Diver, how might the following changes to the American list affect your lists? We often follow.
The following lumping decisions appear to have been made.
(See Feb. Birdwatch & links in the article)

Green-winged Teal with Common(Eurasian)Teal
American Herring Gull with (European)Herring Gull
Siberian Stonechat with European Stonechat.