I'm grateful for that contribution, and just want to reassure Carolyn Thomas that we are very much continuing to work on the idea of a local land value tax. The main underlying objective for local tax is to raise that stable revenue for local services in the fairest possible way. And where we can have other advantages, such as the better use of land, I think we should definitely be looking to squeeze as much value out of these things as we possibly can.

The Welsh Government has published the research by Bangor University, and that assesses the feasibility of a land value tax as a possible replacement for council tax and non-domestic rates. And they did conclude that a local land value tax in Wales could raise sufficient revenue to replace the current local taxes, and also that the distribution of liability could be substantially more progressive. So, I think the research has been very positive in that sense, but it does underline that we have to undertake some further work to assess more fully whether or not a land value tax would be evidently better than our existing arrangements, or the arrangements that we will put in place following the work of reform, which is current.

So, within the scope of the research, Bangor University was able to construct a preliminary statistical model to estimate a set of land values. We have never attempted that kind of work in Wales before, and it did enable Bangor then to determine potential tax rates at which a local land value tax would need to be levied to raise revenues broadly equal to the current system. So, it's really exciting work. But I think one of the key lessons that we learned from it was that it's much more challenging to estimate the land values for non-domestic uses than it is for domestic property. So, we're currently continuing the work exploring this, but the point about having that cadastral database is absolutely key. We couldn't introduce a land value tax without one. 

I know that elsewhere in Welsh Government there's important work going on in terms of DataMapWales, and that is very much about collecting information across Wales in a useable format. And I do have some really interesting discussions with the Welsh Revenue Authority as well, because they're taking a lead on many of the exciting ways in which we're thinking about the potential ways to use digital and data, and so this is another area where we're doing some interesting work. Because having that kind of database would help us with lots of other policies, in fact. It would help us potentially in future with local rates of land transaction tax. So, we would need that kind of database. So, work is definitely ongoing. I'm more than happy to update Carolyn at any opportunity we have.