I did some extensive research in December about this all. My dad was born in Scotland as well. And it is going to depend on what year you were born in as to what way you can obtain your passport. I know for myself I was born in 1984, and what Ive been told is that if you are born after 1983 to a father who is of
UK decent then you should have been british at birth...BUT your parents would have had to been married at the time of your birth. If they were, then you should have no problem. You'll need to get your father's full form birth certificate as well as your full form birth certificate stating him as the father. You will also need your parents marriage certificate and then you can print off a passport application. There is a sepcific one for someone who is British by decent(which woudl be you if all this applies) You can find it on the web. IF your parents were not married at the time of your birth, but were married shortly there after, it is going to depend on what province you were born in. I was born in Ontario and at the time of my birth and my parents marriage, Ontario had abolished a law inreagrds to illigitimate births...but reinstated it in 1990. I believe I was told this law was abolished from 1980-1990. So if you were born within that time frame in Ontario, and your parents were married after your birth(I believe within that 10 years) Then you were ligitimized upon their marriage, making you british once they were married. As for any other province, Im sorry I don't know what applies. So there are many different factors that affect whether or not your eligiable to obtain a british passport. Also, who is this for? Because if it is for just yourself, then that is fine. But your family(wife/husband and children) will not be eligible for a british passport based on your father. They would need to obtain visa's.
Hope I was able to help.
Also, alot of the advice and answers I got was from this website
http://www.ukresident.com/forums/Its a forum site like this, and there are some very knowledgable people on there. Hope all works out for you!