Adlingfleet (English Wikipedia)

"Internal Drainage Board amalgamations". Association of Drainage Authorities. April 2011. Archived from the original on 3 September 2011. Retrieved 1 June 2011.

archive.today

"Release of elvers as barriers come down". Environment Agency. May 2011. Archived from the original on 3 August 2012. Retrieved 31 May 2011.

"Glossary (see Biological quality element; Chemical status; and Ecological status)". Catchment Data Explorer. Environment Agency. Retrieved 15 May 2017.
"Adlingfleet Drain Upper Catchment". Catchment Data Explorer. Environment Agency. Retrieved 4 March 2021.

"Release of elvers as barriers come down". Environment Agency. May 2011. Archived from the original on 3 August 2012. Retrieved 31 May 2011.

Nunn 2007, p. 27. Nunn, Andy; et al. (2007). "Humber eel management issues: barriers and stocking". University of Hull International Fisheries Institute. Archived from the original on 4 March 2016. Retrieved 25 May 2012.

"Welcome". Isle of Axholme IDB. Archived from the original on 4 October 2011. Retrieved 31 May 2011.

Nunn 2011. Nunn, Andy; et al. (November 2011). "Prioritising eel-migration barriers for passage improvements". University of Hull International Fisheries Institute. Archived from the original on 18 March 2018.

"About Blacktoft Sands". RSPB. Archived from the original on 15 March 2020. Retrieved 25 May 2012.

"About Blacktoft Sands". RSPB. Archived from the original on 15 March 2020. Retrieved 25 May 2012.
Nunn 2007, p. 27. Nunn, Andy; et al. (2007). "Humber eel management issues: barriers and stocking". University of Hull International Fisheries Institute. Archived from the original on 4 March 2016. Retrieved 25 May 2012.
"Welcome". Isle of Axholme IDB. Archived from the original on 4 October 2011. Retrieved 31 May 2011.
"Internal Drainage Board amalgamations". Association of Drainage Authorities. April 2011. Archived from the original on 3 September 2011. Retrieved 1 June 2011.
Nunn 2011. Nunn, Andy; et al. (November 2011). "Prioritising eel-migration barriers for passage improvements". University of Hull International Fisheries Institute. Archived from the original on 18 March 2018.