אולי יש תקווה
As a general rule, an unmarried father cannot pass on British citizenship automatically in the case of children born before 1 July 2006. However, if the parents marry subsequent to the birth, the child normally becomes a British citizen at that point if legitimated by the marriage and the father was eligible to pass on British citizenship. Further, if the unmarried British father was domiciled in a country that treated (at the date of birth of the child born before 1 July 2006) a child born to unmarried parents in the same way as a child born to married parents, then the father passed on British citizenship automatically to his child, even though the child was born before 1 July 2006 to unmarried parents.[4] Such countries are listed in UK Immigration and Passport Services publication "Legitimation and Domicile".[5] Failing that, the child can be registered as British if it would have been British if parents were married and application is made before the child is 18. בהנחה שנולדת בישראל, אביך הפך תושב או חי פה, והוריך לא היו נשואים לאף אחד אחר אז ייתכן שאתה עדיין זכאי לאזרחות בריטית כיוון שייתכן שעל פי הדין התורני הישראלי אתה ילד חוקי של שני הוריך (אני מניח ששמם מופיע בתעודת הלידה שלך). ראה http://www.ips.gov.uk/cps/files/ips/live/assets/documents/Legitimation_and_Domicile_TO_PUBLISH.pdf הנושאים האלה מורכבים ומתייחסים אליהם באופן פרטני - תתחיל לברר מול השגרירות