Cryolab has published a detailed guide covering:

Vapour phase storage and cross-contamination: the HFEA has been moving towards clearer guidance on closed carrier systems and vapour phase storage for licensed facilities, with implications for the cryovials and storage devices used in clinical practice. The consent question: both gamete providers must provide ongoing consent for embryo storage across the entire storage period. The practical and legal implications of this over a 55-year window are significant.

Clinical equipment requirements: liquid nitrogen storage tanks must maintain -196 degrees Celsius continuously, with vacuum integrity preserved and monitoring systems operational across multi-decade storage periods.

Expert commentary from Paul Hague, Director of Cryolab, who introduced the controlled-rate freezer to Professor Robert Edwards and has attended 42 consecutive ESHRE Annual Meetings.