I was given to understand the new SE UK chart had an annotation stating that it wasn't complete and more airspace was to be notified- you wouldn't get that with Jeppesen charts
That's not the whole story.
The CAA updates its charts just once a year (as far as anyone can tell) and a particular edition (say, the current Ed 32 for the 1:500k southern VFR chart) could be on sale in a pilot shop for the whole year. So you could be buying data anything up to say 14-16 months old. And we know 99% of pilots aren't going to wonder about the ais.org.uk site looking for some PDF listing the mistakes and updates...
Same with the electronic charts which the CAA sells to Memory Map. They don't change either, within a particular edition number. That is criminal - it's electronic data and it being bang up to date would create an incentive for pilots to use electronic data, but no, the CAA is firmly stuck in WW2
With Jepp, the
paper chart situation is the same but at least they do offer an electronic alternative which is updated on the 28-day cycle. It's not dirt cheap - the Raster Charts CD for the whole of Europe is about £200 though that's less than the paper charts would cost - but you get something potentially a lot more current.
Jepp have fallen down on UK chart accuracy, probably because so few UK pilots use Jepp charts, so errors don't get reported. This is a problem that uniformly affects
all flight information - have you tried phoning/faxing some number published in the "official" AIP for, say, Croatia or Greece? Jepp also have a good amount of corporate arrogance on e.g. the way airways are depicted on their GPS data. But they do provide data which should be updated frequently; you just have to pay for the updates (no free lunch anywhere).
Ultimately, IMV, the CAA is the bunch to blame. If they did what the FAA does and made all data available in electronic form (including approach plates that are usable in the cockpit, not the "A4 with small fonts" rubbish that is in the AIP) that would be a big step in safety. No need to publish a list of chart amendments - just upload the corrected chart on the internet.