https://www.euronews.com/2019/03/12/caa-suspends-boeing-737-...
http://publicapps.caa.co.uk/docs/33/SD2019001.pdf
Norwegian Air and Norwegian authorities had the same information (or indeed lack thereof), but did not act until now. Given the known similarities, and the lack of data that rules out a problem with the B737 MAX, the responsible thing is to err on the side of caution.
