I hope that this mean you should have no problems.
There are a number of members here who have been in similar or even more complicated circumstances and have won through.

Children born on or after 1 July 2006
• the mother (i.e. the woman who gives birth to the child)
• the father if:
a. he is married to the mother at the time of the birth; or
b. he is treated as the father under section 28 of the Human Fertilisation and Embryology Act 1990; or
c. (if neither (a) nor (b) apply) he can satisfy certain requirements as regards proof of paternity – i.e. he is named as the father on a birth certificate issued within 1 year of the child’s birth or he can satisfy the Home Secretary that he is the father of the child (by means of DNA test results, court orders or other relevant evidence)
Source:-
BN4 - BRITISH CITIZENSHIP - CHILDREN BORN OUTSIDE THE UNITED KINGDOM SINCE 1 JANUARY 1983

Hope this is helpful