Looks like the new TomTom app was released to the UK overnight.
'Freemium' type subscription now - everyone gets all TomTom maps/traffic/speed cameras for free for the first 250km and an additional 76km per month. Beyond that you need one of the subscription options, which are better value than the previous app, especially if you want to download the odd map for a holiday.
You will not get an upgrade on previous TT purchases.
I've been using it for a few months now and prefer it to the old one, GPS seems to be more reliable in the app. However, there are several features missing over the previous one.