I thought it might be interesting, and informative, to have a thread about how things throughout the UK. Not customs or traditions, but actual practical things.
So, for me, as someone in N Ireland the first things that spring to mind is that the following things differ from England.
The compulsory school starting age
The cut off date for when you go into one school year or another
The names of the school years
And then I know that with education, Scotland is different again...