English: I'm not an expert in this area, but it is operational, as I understand it, in places like Denmark and Estonia, for example. And they gather information in one central location - the ownership of property, the type of property. One thing that's deficient about the current system is that this element of the value of property comes into it. It's odd that we have to revalue every five years, because we're in the hands of a market that is beyond all of our control. And, of course, if house prices increase, then we have to shift the bands up too, or people will be taxed on the vagaries of the housing market, which is entirely beyond their control. You could live in a home that you bought for £20,000 20 years ago, and it's now worth £200,000. So, it's odd that you're taxed more as a result. So, we have to shift the bands at the same. What revaluation does, of course, is to take note of changes that have happened during that period. For example, if you add an extension to your home and that has an impact on the value of the property, then that needs to be taken into account. That's where a cadastral map would come into it. Any planning consents could be taken into account; I assume that it could take account of building regs and so on and so forth. So, it's an idea. I've only just become aware of this cadastral concept - I didn't know the meaning of the word when I first saw it. But it appears to me to be an excellent idea in gathering all sorts of information and data on the ownership of land, the kind of property, the use of that land. Imagine if we had that information. And these days, of course, it is relatively easy to gather data and to bring it together, and to analyse that data for your own use. That's what we don't have at present; we're still working under an old system. We have a planning system here and the Land Registry elsewhere - don't ask me to comment on the pace of the Land Registry; they're dreadful. But then you have the valuers somewhere else, so there are three areas there that are all relevant to us as politicians in considering how we collect taxation from property. I am going on slightly, because I've become excited by this idea of a cadastral map. As a map enthusiast, I think it is a very interesting idea. I would like us, in the first instance, to look to Denmark and Estonia, and places similar to that, to see the work that they're doing to gather that data and to bring it together. I apologise for going on slightly too long.
Welsh: Dwi ddim yn arbenigwr yn y maes, ond mae o'n weithredol. Mae o'n weithredol, fel dwi'n deall, mewn llefydd fel Denmarc ac Estonia. Ac maen nhw'n casglu gwybodaeth mewn un man - perchnogaeth eiddo, math o eiddo. Un peth sydd yn wael am y drefn bresennol ydy bod yr elfen yma o werth eiddo yn dod i mewn iddo fe bron. Mae'n beth od, onid ydy, ein bod ni'n gorfod ailbrisio pob pum mlynedd, achos rydyn ni yn nwylo rhyw farchnad sydd y tu hwnt i reolaeth pawb ohonom ni. Ac, wrth gwrs, os ydy prisiau tai yn codi, wel, mae'n rhaid inni symud y bandiau i fyny hefyd, neu mae pobl yn cael eu trethu ar ychwanegiad mewn pris tai sydd y tu hwnt i'w rheolaeth nhw yn llwyr. Mi fedrwch chi fyw yn y tŷ, wedi'i brynu fo am £20,000 20 mlynedd yn ôl, a bellach mae'n werth £200,000. Wel, mae'n beth od eich bod chi'n cael eich trethu mwy am hynny. Felly, mae'n rhaid symud y bandiau ar yr un pryd. Beth mae ailbrisio'n ei wneud, wrth gwrs, ydy cymryd sylw o'r newidiadau sydd wedi digwydd yn ystod y cyfnod yna. Er enghraifft, os ydych chi'n ychwanegu rhyw estyniad sylweddol i'ch tŷ a bod hwnnw'n gwneud gwahaniaeth i werth yr eiddo hwnnw, wel, mae eisiau cymryd sylw o hynny, felly. A dyna lle fyddai map cadastral yn dod i mewn. Byddai unrhyw ganiatadau cynllunio; byddai, dwi'n cymryd, yn gallu cymryd golwg ar y building regs ac yn y blaen. Felly, mae o'n syniad i mi. Dwi newydd gael gafael ar y syniad cadastral yma - doeddwn i ddim yn gwybod ystyr y gair pan welais i o gyntaf. Ond mae'n ymddangos i mi fel syniad arbennig o dda i gasglu pob math o wybodaeth ynglŷn â pherchnogaeth tir, y math o eiddo, y defnydd o'r tir hwnnw. Meddyliwch os oes gennym ni'r wybodaeth yna. Ac yn y dyddiau hyn, wrth gwrs, mae hi'n gymharol hawdd casglu data, ei roi at ei gilydd a'i ddadansoddi er eich defnydd chi. Dyna beth sydd gennym ni ddim ar hyn o bryd; rydyn ni dal o dan hen drefn y system gynllunio yn fan hyn a'r Gofrestrfa Tir yn y fan yna - peidiwch â gofyn i mi wneud sylw ar arafwch y Gofrestrfa Tir; maen nhw'n ddifrifol. Wedyn, mae gennych chi'r priswyr yn y fan acw - tri maes sydd yn berthnasol i ni fel gwleidyddion i ystyried sut ydyn ni'n casglu trethiant allan o'r eiddo. Dwi'n mynd ymlaen, braidd, achos dwi wedi cyffroi o'r syniad yma o fap cadastral. Fel dyn mapiau, dwi'n meddwl ei fod o'n syniad hynod o ddiddorol, ac mi fuaswn i'n licio, yn y man cyntaf, inni edrych ar lefydd fel Denmarc ac Estonia i weld pa fath o waith maen nhw'n ei wneud i gael y data yma ynghyd. Mae'n ddrwg gen i am draethu.