BP to exit Tate
This part of the chain, at least, has been cut:
http://platformlondon.org/2016/03/11/bps-sponsorship-of-tate-is-over/
Congratulations and thanks to all the artists, non-artists and otherwise who helped make this happen...
See also: http://platformlondon.org/2016/03/21/tate-bp-not-the-end/