This has been translated from a German forum taken from the Munster/Osnabruck FB page.
The Facebook team has a new standard response to questions about London:
Hello ...
Thank you for your interest in the London flights.
The last flight with CityJet London City Airport is at 28.03. take place.
As it stands the London connection will continue, but not seamless.
Also there will be a change of airport in London.
We currently believe, in February or early March at the latest to make an official announcement.
A first flight is expected to take place before the month of May.