"Paul Corfield" wrote in message

On Wed, 9 Dec 2009 12:38:43 -0000, "Recliner"
wrote:

I was agreeably surprised to discover yesterday that the Kings Cross
St Pancras LU station remain an OSI, even though it's no longer
necessary. I went to have a look at the new northern ticket office,
exiting from one of the old LU gatelines and re-entering a few
minutes later via the new northern gateline. My Oyster fare to the
station was zeroed out as it's treated as an OSI, even though I
could have changed LU lines without passing any gatelines.

Well it has to remain an OSI because PAYG is valid on GN services to
Finsbury Park and PAYG is valid on FCC to West Hampstead and south to
Elephant and LOB. As these parts of the Kings Cross complex have
separate gatelines then the LU site has to remain a OSI too.

Yes, I knew about those, and have taken advantage of them in the past,
but I was surprised to find that OSI still applied even to pure LU
transfers. I hadn't thought of the MIP lifts issue, though.