The UKHO intends to withdraw from paper chart production by 2026

[mm5aho]

The meeting wasn't centred around this topic. (more about lighthouses and AtNs. hosted by NLB)
But the timescale is quite tight(IMO), 2026 to complete. The info UKHO produces is used by many (such as Imray) to produce paper charts. And yet others also print paper to order, from the source electronic charts, so I don't think there's a risk that those using paper will have nothing, just fewer supply sources.
The coverage of any chart is quite variable. UKHO ones are numbered, and so far universally recognisable from those numbers, but a new grid system will create some confusion to start with.

[BlowingOldBoots]

Why devise another grid system, what is the objective?

[Gardenshed]

from what I've seen, the chartplotter companies and charts don't use the UKHO chart numbers (Navionics, Raymarine etc).
not sure what the change in UKHO numbers will achieve. As noted above, the chart numbers are well known but as they are being withdrawn, then the new numbering system has to make sense for their new electronic commercial plotters/systems and a smaller user-group
future reality will be annual subscription to Navionics etc and paper charts and folios used occasionally, not undated in violet ink, until they are too damaged to use.
best use of old charts: wallpaper for the smallest room in the house

[BlowingOldBoots]

The UKHO will extended paper charts until “at least” 2030.

From the RYA:-

These conversations have highlighted a number of important transnational and regulatory factors that need further consideration. It has become clear that more time is required to address the needs of those specific users who do not yet have viable alternatives to paper chart products, so the UKHO will continue to provide a paper chart service until at least 2030.

So, the consensus was that everyone uses digital charts. Bollocks. By coincidence, I am on a brand new drill ship being commissioned in Korea.

It is DP3 (Dynamic Positioning 3), which means it has the highest levels of redundancy for station keeping. They have only one ECDIS system and paper charts are the backup. To get rid of paper they would need another ECDIS system to maintain class and redundancy. I was surprised at this.

I think the UKHO is guilt of hubris when considering their view of the world being paperless.