  The luminous narrow line Seyfert galaxy PG1211+143 was the first non-BAL AGN
to reveal a powerful ionized wind, based on early observations with ESA's XMM
X-ray Observatory. Subsequent observations, mainly with XMM and the Japanese
SUZAKU Observatory, found such winds to be a common feature of luminous AGN.
Typical outflow velocities of v $\sim 0.1$c and flow momenta $m v \sim L_{\rm
Edd} /c$ are consistent with winds being launched by continuum driving from a
disc when the local mass accretion rate is super-Eddington. Here we report the
launch of a new, ultra-fast outflow component in PG1211+143, near the end of a
5-week XMM observing campaign, and discuss its origin in an ultra-fast {\it
inflow} of similar velocity detected some 3 weeks earlier. We find that the
inflow lasted for at least 3 days and delivered some 10 Earth mass of fresh
material into the innermost region of the source. While this mass by itself is
insufficient to cause a complete inner disc restructuring, we show that it is
sufficient to disrupt the X-ray emitting corona of the disc. We conclude that
it is this coronal re-arrangement of the inner tens gravitational radii in
PG1211+143 that subsequently caused the launch of a new wind.
