Below is a selection of useful sites relating to Washington in West Sussex, starting with Washington Parish Council:
Washington Parish Council:
https://www.washingtonparish.org.uk/
West Sussex County Council:
https://www.westsussex.gov.uk/
Washington Sussex – Wiki:
https://en.wikipedia.org/wiki/Washington,_West_Sussex
Visit Horsham:
https://www.visithorsham.co.uk/location/washington
Things to do in Washington:
https://www.dayoutwiththekids.co.uk/things-to-do/south-east-and-london/west-sussex/washington
Washington – in British History Online:
https://www.british-history.ac.uk/vch/sussex/vol6/pt1/pp247-259
Idyllic 5 mile circular walk: