On 26th Dec 75041, IFO unlocked during ETMX stage of in-lock charge measurements in 75171  I adjusted guardian code to make the transition more robust.

The ITMX, ITMY, ETMY measurements did run, analysis attached. ETMX hasn't ran since November. We will try to run them all this week in commissioning time.

Note that the x-axis of the plots isn't a to-scale time axis, we will try and change this.