Solving that isn't unfortunately going to give you what you want, as the BBC have changed their feed structure.
The URL in that data now just gives
<?xml version="1.0" encoding="UTF-8"?><rss xmlns:atom="http://www.w3.org/2005/Atom" version="2.0"> <channel> <atom:link href="http://open.live.bbc.co.uk/weather/feeds/en/NE16/3dayforecast.rss" rel="self" type="application/rss+xml" /> <title>BBC Weather - Forecast for NE16, United Kingdom</title> <link>http://www.bbc.co.uk/weather/ne16</link> <description>3-day forecast for NE16 from BBC Weather, including weather, temperature and wind information</description> <language>en</language> <copyright>Copyright: (C) British Broadcasting Corporation, see http://www.bbc.co.uk/terms/additional_rss.shtml for more details</copyright> <pubDate>Thu, 01 Jan 1970 01:00:00 +0100</pubDate> </channel></rss>
Rather than the 3 day forecast.
You can use the standard pre-installed
xml node to do the work of the missing xml2js component.
Attach a debug and then using the tooltips described here https://nodered.org/docs/user-guide/messages
You should be able to find and copy the paths to the pieces of the messages you want.