From the site linked, "LW" is the name given to the London mux that will carry "London Live".
Tuner: Pinnacle PCTV DVB-T Stick Solo (72e) - was a tenner brand new & sealed in my local charity shop!
Software: Not sure if I can register it's own on more than one PC, so tried downloading drivers only and using with VLC (while VLC can do DVB-T, it's pretty clumsy unless you save a playlist or something ... found it once and looking for it again).
Other software tried (seems to work, but strains the netbook more than VLC) - SmartDVB -
http://www.smartdvb.net/ - the frequency list does not seem to have been updated to final post switchover though.
Also, with SmartDVB, as many find, does not work with the default Windows CODEC, but ok with FFDSHOW