Children born from sperm donors will be able to track down their biological fathers later this year.
The first people born since a 2005 law change banning anonymous fertility donations will turn 18 in November.
They will be able to request their donor’s full name, date of birth and their last known address.
Initially, 30 can access their donor’s details from late 2023. The Human Fertilisation and Embryology Authority said this will rise to about 766 by the end of 2024 and 11,427 by 2030.
The law changed after DNA ancestry tracking websites made it impossible to guarantee anonymity to donors.
The HFEA is now issuing a call to anyone who donated sperm, eggs or embryos since 2005 to make sure their contact details are up to date.
Information director Rachel Cutting said: “As we approach this landmark moment, we have concerns not all donor-conceived individuals who apply for this information will be able to reach their donor.”
Around 1,800 babies born using an anonymous donor since 2005 will not be able to get the details because of exemptions.
They include those born from embryos using an anonymous donor stored prior to the law change came into force.
