Flag of Guernsey
... that the Flag of Guernsey is based on a banner used by Duke William the Bastard of Normandy during the Battle of Hastings?
... that the <b id="mwAus"><a href="./Flag_of_Guernsey" id="mwAuw" rel="mw:WikiLink" title="Flag of Guernsey">Flag of Guernsey</a></b> <i id="mwAu0">(pictured)</i> is based on a banner used by <a class="mw-redirect" href="./William_I_of_England" id="mwAu4" rel="mw:WikiLink" title="William I of England">Duke William the Bastard</a> of Normandy during the Battle of Hastings?