Just to amplify what Baikonour rightly pointed out:
A 'proper' FP is not required
From Article 2 of Commission Implementing Regulation (EU) No 923/2012:
‘flight plan’ means specified information provided to air traffic services units, relative to an intended flight or portion of a flight of an aircraft;
Note that the Regulation doesn't specify the medium to be used.
Also:
I believe you can also subscribe to a service from the CAA to receive updates, but you may find yourself swamped with stuff which is irrelevant and consequently miss out on the stuff which does matter to you
You can indeed subscribe for free and you can also select in which subject areas you wish to be informed and what to ignore.