I have been racking my brain too. I think across the fields was our own choice, but as you say, I can't imagine mums pushing their silver cross over there as it was more like the outback than anything
One thing I do remember is begging my mum to let us eat a piece of toast on the way to school like the kids next door. She said eating in the street was common and we would have our breakfast at the kitchen table like it or not (the kitchens were a good size as I remember - not massive, but room for a table in the corner)
I also can't believe that our mums had to walk all the way to East Ham High Street with a big heavy pram with a baby in and a few kids in tow. My mum said it was often more than once a week. You couldn't buy much in the local grocers. I remember a lorry used to come round selling fruit & veg though - hard to forget really as I stood on a wheel once with my arms around the wheel as he pulled away - my scream as the wheel squashed my arm was enough to make him stop - I have forgotten what happened. My mum told me recenly but I have got a head like a sieve. I think he offered to take me to hospital but my mum decided nothing was broken (kids rubber bones ) as the worst thing was the pattern from my jumper imprinted on my arm
PS - Not much to see here (My younger brother John in Playpen)
It must be Paget Gardens you can see in the background.