I emailed my PCT re their near-blanket 28-day prescribing rule (which does seem to grudgingly allow doctors to prescribe for 56-days if they think they need to).
This is their response:
Thank you for highlighting this report to us, as this is a very new report we have not yet had time to read and implement its contents. We still recommend 28 day prescribing for most situations, but there has always been discretion for GPs to give longer-term supplies for stable patients. The suitable length of supply depends on many factors especially how stable the patient is.
Since the wording of the report states
Levothyroxine should be prescribed and dispensed in quantities covering three months supply, where appropriate, in order to address issues of continuity of supply and also to improve convenience to patients
that each patient on thyroxine needs to be individually assessed by his GP. If a patient shows the report to their GP it seems likely that they will be able to persuade him to give longer term prescriptions.
Which I take as meaning they feel they cannot be seen to be imposing 28- or even 56-day prescribing on GPs for stable patients.
If you have a problem persuading your PCT, I suggest you contact them quoting the above and the MHRA report itself:
Picture is an Aztec calendar