The recent update to the MA compilation method revealed a sudden reduction in the growth rate. However this was driven by a mysterious "improvements in reporting at one institution", which saw £85bn vanish in January 2014. I made a shadow M' series which added this back in, but that's not ideal.
I've just tried an alternative response, which is to strip MFI deposits from the measure. We can call this MAex, and here's the series from April 1991:
If you want to see a more recent look, here it is from January 2001:
I'm continuing efforts to improve the measure.