I don't have any personal recommendations for you, since I'm in the US, but I have been using Microsoft Streets and Trips 2010, which works just fine, but it isn't made at all for a touchscreen interface, so I'm replacing it. I just purchased Garmin Mobile PC, which seems to be used more and more by people on the forums here and I know that the interface is much more touch-screen friendly (although it doesn't come with an onscreen keyboard out of the box). From what I understand, the Garmin software is locked to a single computer, but you can contact Garmin to reset this every six months.
Garmin Mobile PC (European version: 010-11018-01 ): https://buy.garmin.com/shop/shop.do?cID=139&pID=13484
Autoroute 2010 (European version of Streets and Trips): http://www.microsoft.com/uk/homepc/a...e/default.mspx