Wood Lane (aka the A219) is closed in both directions today due to "emergency repairs" between South Africa Road and Shepherd's Bush Green. According to the TFL website, the closure has been caused by a burst water main.
If you're driving, it's probably best to avoid the whole Shepherd's Bush area until the works are completed.
As to when that will be, there is no information as yet. The closure has been in place since wednesday, with no end in sight. Meanwhile, gridlock on the streets of Shepherd's Bush.