Whoops, I missed the ICU version change. I've added that to the OP. I've also added the missing php.ini file to the guide. Thanks for noticing this.
I had also made another mistake which I've fixed. I initially tested with Wampserver 3.2.0 and just assumed it was the latest version. Then I double checked and found out at the last minute it wasn't and quickly retested with 3.2.2. It looked OK a
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