Tern ID please

[gramps]

A distant record shot of a Tern.

Regular 'scope-birders' in the hide said it was an Arctic Tern, "similar to a Common Tern but without a black tip to the bill".
Someone else said it's a Red-billed Common Tern and yet another has said it's just a Common Tern.
Any positive ID would be appreciated.

 

[Gronk08]

Although it does not show the black tip to the bill that usually is the key id feature to Common Tern, I would agree that it is a Common Tern based on bill length and shape

Tim.

 

[gramps]

Although it does not show the black tip to the bill that usually is the key id feature to Common Tern, I would agree that it is a Common Tern based on bill length and shape

Tim.

Thanks Tim, tricky job this bird ID lark.