Thanks for taking the time to reply. I am indeed aware of non-K/K series, just wanted to confirm that it’s possible to control PL1 and PL2 on non-K series. The BIOS manual seems to suggest it is as well. Thanks again :-)

At least in the UK, Openreach seem to have very power resilient COs (as long as you can power your local kit). But then I’ve only had a 1 hour power cut in 15 years so it’s a bit hard to say :-)