Thank you everyone.
We might have a development. I am not in the UK, but my mum, who is in the UK picked this up at a charity shop in the Midlands and brought it out for me when she visited.
Here in SA we have a store similar to M&S and back in the day they sold some St Michaels clothing. At a whopping price too. I think this is how I recall the logo.
I asked a friend's mum if she knew this logo and she seems to think (but wasn't sure) that it was an SA version from this store, so along the lines of St Bernard as mentioned upthread. A subsidiary of M&S in South Africa.
If this is the case, then this skirt is well travelled. If it was bought new in South Africa, it's been taken to the UK and handed into a charity shop there, and now it's travelled back to its home in South Africa again. 😊
I have searched online again to try see if this could be, but still have got no further to be sure.
It would make sense as to why I sort of recognised it though, I may have seen it many years ago as a child. It definitely does not seem to be very common or very easily identifiable though.
I was wondering about the 1177 on the care label, maybe it was manufactured November 1977.
For the pp who wanted to see it, I've added a photo. It's has a white belt too which isn't on in this pic.
It doesn't fit either DD or myself, so I'd like it to go to someone here who would wear it. The photo doesn't do it justice at all.
The sizings here are the same as UK, so I did wonder about how a 26" waist could be a 14.
I do love old clothing, I wear a lot of thrifed items, and I would just love it if what I suspect about this item and it's history is correct.