This happens all the time. It always spooked me when I had CML under my microscope but she kept hurtling on up after.
The FSB sets mandates for UT's to only hold a certain percentage in sectors so when the weightings change over time, they have to correct it.
What worries me is that the Trading Statement should have been out by now so we might be under 20% gain in HEPS for the first time in years.