I think that whilst "+" does mean valid for a cross-London transfer, it
*doesn't* mean that it is valid for any tube journey to get to King's
Cross.


Putney - Train/tube connection - KX - Peterborough - Local station
was the intended and valid route and I would have gotten the replacement bus
from Putney if they were more frequent and not full

Presumably I could miss out the Putney-Train/tube connection part and it
would have been valid from e.g. Vauxhall or Victoria (or West Brompton?) to
Kings Cross on the tube. If so, why not from South Kensington to KX?
Chris