www.ipu.org/parline-e/parlinesearch.asp

An International Parliamentary Union database on structure and working of parliaments around the world.

www.ipu.org/english/parlweb.htm

A link to websites of national parliaments.

https://www.idea.int/our-work/what-we-do/gender-democracy

The International IDEA website on democracy and gender issues.

https://boundarycommissionforengland.independent.gov.uk/

The gateway to the work of the Boundary Commission for England.

http://www.bcomm-scotland.independent.gov.uk/

The gateway to the work of the Boundary Commission for Scotland.

http://bcomm-wales.gov.uk/2018-review/?lang=en

The most recent report of the Boundary Commission for Wales.

www.pippanorris.com

This includes links to many databases on British constituencies.