1.   Alarm bells have begun ringing in ship wardrooms and naval headquarters on both coasts.

2.   Alarm bells started to ring when he failed to return home.

3.   As soon as a key was inserted it rang a loud alarm bell and palace guards would rush in with drawn swords.

4.   But alarm bells rang when Allison wrote back in December.

5.   But now the alarm bells are ringing again.

6.   Even so, alarm bells are beginning to sound at Westminster.

7.   If he also asks for a large deposit, the alarm bells should be ringing.