0That would be a very informal letter so I'm not sure you need to worry too much about 'rules' anyway (are you sure the US would finish a salutation with a full stop?).02br 02br 00Hi Peter,02br 02br 00is the form I would think is most common in the UK to match with the more formal 'Dear Peter,'0-
0Yes, just so, in a business letter, we would use the colon.02br 02br 00Dear Ms. the'Brit:02br 02br 00Dear Mr. Spinnaker:02br 02br 00But the full stop is not right.0-