It's important to know that John Read is part of a campaigning group that aims to increase use of psychological therapies and decrease use of psychiatric (ie, medication or ECT) interventions. He's not a credible source of information. This article is a great example, it misrepresents the evidence base. This group does not believe that mental illness exists -- bipolar disorder is just people being irresponsible, autism is simple bad parenting, psychosis is people making stuff up -- which lead the group to create the "power threat meaning framework".
https://www.bps.org.uk/sites/bps.org.uk/files/Policy/Policy%...
A discussion of this document is here: https://www.nationalelfservice.net/mental-health/power-threa...
> One is that homeopathic treatments are still available on the NHS
They're effectively banned. The NHS even went to court to maintain the ban. https://www.england.nhs.uk/2018/06/nhs-england-welcomes-home...
NICE doesn't have guidance for homeopathy, but they do have an evidence search. None if it shows any benefit: https://www.evidence.nhs.uk/search?q=homeopathy
The guidance for ECT has a section about evidence. You're right that some of the evidence is low quality, however you don't get similar evidence of effect with homeopathy trials - https://www.nice.org.uk/Guidance/TA59
> The Assessment Report reviews data from 90 RCTs in individuals with depressive illness, of different grades of clinical severity, who were referred for ECT. Overall, these RCTs provide evidence that real ECT (that is, where an electric current was applied) is more effective than sham ECT (where no electric current was applied) in the short term. The data provide evidence that the stimulus parameters have an important influence on efficacy; at the end of a course of treatment, bilateral ECT was reported to be more effective than unilateral ECT. Raising the electrical stimulus above the individual's seizure threshold was found to increase the efficacy of unilateral ECT at the expense of increased cognitive impairment. In trials comparing ECT with pharmacotherapy, ECT had greater benefit than the use of certain antidepressants but the trials were of variable quality and inadequate doses and durations of drug therapy were frequently used. The combination of ECT with pharmacotherapy was not shown to be superior to ECT alone, although the duration of the RCTs was insufficient to show whether pharmacotherapy was beneficial. Compared with placebo, continuation pharmacotherapy with tricyclic antidepressants and/or lithium reduced the rate of relapses in people who had responded to ECT. Preliminary studies indicate that ECT is more effective than repetitive transcranial magnetic stimulation.