You don't only have to buy Clarks or Startrites OP. I have lived in a few countries in my life, and in all the countries I have lived in, it is only the UK that his this obsession with Clarks and Startrite shoes. I do realize, that the dc in UK have to cover their feet to keep them warm, unlike African dc who run around most of the year not wearing any, but paying 40 odd pounds for a first pair of shoes is quite amazing to me.
Fwiw, I did have dc in UK. Neither of them wore any shoes before they were walking properly. Dd had a problem with her foot (happened during birth, so nothing to do with shoes
) and we had to see a podiatrist. I discussed the Clarks/Startrite phenomenon with him, and he was totally in agreement with me, that expensive shoes like these are not a necessity, but more than parents are made to feel that they should be buying them by how they are marketed.
As long as they are sturdy enough to support the foot, there is sufficient space for the foot, have a good closing mechanism (ie laces, buckle etc) and allow the foot can breathe, then they will be fine.
My dc wore shoes from M&S, Debenhams and the like.
And yes, I did get frowned upon at the school gate, as it wasn't the "norm" to not have dc not wearing school shoes from the exclusive brands. And, if they lasted 6 months it was a lot, not due to the fact that they were worn out, they were still perfect most of the time, but that they were grown out of.