-3 C when DS left for school this morning...... in his BLAZER 
What do you do?
Is there a solution?
He is only in his second term of secondary, so this is a new phenomenon for me...
There is no 'official' school coat as such, but it has to be plain black or navy and long enough to cover his blazer apparently.
He already has a NEXT black moleskin jacket, and a more casual black jacket too... bu won't wear either...
Help.