Tony Bryer wrote in article

http://news.bbc.co.uk/1/hi/technology/3121652.stm

Quote:

Civil rights campaigners have expressed concerns about the new smart
travelcards introduced for London commuters.

Under the new system, Transport for London will be able to track a
commuter's movements and it plans to retain information on journeys
made for "a number of years"

As with retention of mobile phone call data, the possibility of the
data being useful to prove an alibi ("and then I went straight home")
never crosses the 'minds' of Civil Rights Campaigners.

--
Mike D