Would you....

Yes, definitely worth contacting the Practice Manager. We’re about to do the same because of, what appears to be, a right hand doesn’t know what left hand is doing!

Yes I would definitely get in touch with the manager maybe by asking to see her and speak to her. You can then do it in a pleasant way. I always feel email can be interpreted in many different ways. If you cannot go into the surgery easily then a phone call.

I would certainly be having a word with the Practice Manager. You are savvy enough to understand how vital it is to receive all of your items, especially something as crucial as insulin. However, the next victim of this omission may be, for instance, in the early stages of dementia or have a learning difficulty and, thus, not realise how important it is that they have all their medicines and fail to follow up on the error - with possible serious consequences.

Are you signed up on-line to order your repeat prescriptions, make appointments etc? If so, you would see whether your GP had approved all items you requested. In any event, I agree you should take up this matter with the PM.

Chriskat as stated in OP yes I am signed up to order by e-mail, I also make appointments online.
It is not a case of GP approval, In both cases the receptionist apologised and said items had been omitted in error.

Disasters happen because I don't want to get a bad name for being a complainer

If you do not complain their next mistake could kill someone.

It is possible to complain - and frequently - if you do it in the right way.

I am not meaning this as an excuse and they may well have been left off by accident but these are some of the reasons why an item could be missed off.

Acute prescriptions (one that you may not need for more than once or twice) are not repeats unless the GP marks them as so and therefore will not be on the repeat list.

Some scripts are authorised for 6 months and at the end will only be re-authorised for repeat if the GP says so

Some scripts will not be authorised for repeat if you have failed to follow a request like get your BP checked or come in for review or have a blood test
There are many reasons why a script might not be actioned as you asked including human error. Why not phone the docs secretary or the reception manager or the prescription staff and ask them. Or, as you suggest, the Practice Manager (though in my experience they don’t have a clue and would ask someone else anyway).

Doodle yes I understand your point.
However, having been prescribed insulin It's not something they are going to suddenly stop prescribing for me
. The item left off the last script was the hypodermic needles needed to inject the insulin, making the insulin pens of no use at all. Last time it was the insulin pens themselves missing all my tablets were supplied.
Due to my diabetes I do have regular drug reviews both with the nurse and my GP.
As far as I'm aware my practice doesn't have 'prescription staff' or a reception manager. One doc who owns the practice, one other, two nurses, and three reception staff and a practice manager whom I couldn't even tell you whether they are male or female.

I'm a lucky one as I order my script/s as and when ( no over-ordering allowed ) then within 48 hrs it's delivered to my house. What could be better than that ?

Does seem like a small Practice ninathenana and under the circumstances you mention I don’t think a question to the Practice Manager would be out of order. Contrary to popular opinion most GP staff don’t hold grudges and there may well be a simple answer to your question.

Yes, I would query it.

The way we order online you can see exactly what you have ordered can you do that after ordering ? I have never had a problem and I get lots of medication.