HydroReturn is the tool for logging authorised lethal control sessions against an issued A06 licence. Per-bird records, photo evidence, quota tracking, and automatic generation of the Natural England return document at the end of the licence period. Access is granted individually to confirmed licence holders only.

Only licensed A06 operators. Specifically:

If you're not a licence holder or a named authorised person, HydroReturn is not for you. The public-facing tools for cormorant recording are the Cormorant Report and, if invited, Roost Surveys.

The tool is deliberately separate from the general public flow. Lethal control records need a chain of custody that starts with verified identity.

Per session, per bird:

Per session overall:

HydroReturn shows you:

This isn't just a convenience — it's a compliance safeguard. The system will not accept a record that exceeds your quota or falls outside your licensed dates.

At the end of your licence period (or on request), HydroReturn generates a PDF return document in the format Natural England expects:

The document is produced in minutes, not the fortnight it used to take to assemble by hand.

HydroReturn supports offline capture. You can record sessions without signal — the records queue locally and upload when you're back online. Photos are cached, GPS is captured from the device.