Intrepid wrote:colon after Dear Patrick
of is optional
comma after regards
Hmmm....
Dear Yoong Liat
This is the customary UK way of writing a letter that I was taught. As you can see there is no colon after your name, and there will be no comma after 'regards' either.
With best regards
Contrex
Incidentally, UK business and formal letters have an ending that depends on the salutation. If you use the recipient's name e.g. "Dear Mr Smith" at the beginning, you end the letter "Yours sincerely". If you use "Dear Sir" or "Dear Madam", you end the letter "Yours faithfully".
If you are writing to someone whose name and title you do not know, use the greeting Dear Sir or Madam, and the ending Yours faithfully, signing yourself with your initials and surname.
If you are writing to a named person, address them as Dear Mr/Mrs/Miss/Ms, and end Yours sincerely, followed by your first name and surname.
If you have met them or spoken to them by phone, or otherwise feel that you have some acquaintance with them, address them by their first name and sign yourself Yours sincerely, using your first name.