Gametes

A gamete is a reproductive cell of an animal or plant.

Gametes are sex cells. Eggs are female, and sperm are male.

https://www.legislation.gov.uk/ukpga/1990/37/section/1/enacted

In July 2022 the HFEA changed the law so that gametes and embryos could be stored for up to 55 years, providing they reconsent every 10 years: https://www.hfea.gov.uk/about-us/news-and-press-releases/2022/new-law-comes-into-force-giving-greater-flexibility-for-fertility-patients

In principle, this can lead to donor conceived siblings with a 50-year age gap or a biological parent that is over 100 years old when the donor conceived child is born. This could have a profoundly negative effect on a DCP.