LIDAR UK Map?

You'll need some GIS software, for example QGIS (freeware)

http://www.qgis.org/en/site/

My that is a massive software download. My creaking Dell Optiplex, although with a healthy new hard drive, is toiling with the installation.
Just trying to open one of the tiles now. Taking a while. Any tips?
Just persevere...?