Look at salary sacrifice. This give you the option of buying childcare vouchers before tax. So taking you below the 100,000. Otherwise pay more into pension and drop below the 100,000 threshold.
Not tax advice, not financial advice...
I wasn't aware of this, I'll take a look and see if it applies thanks.
The pension route is the way I've gone to deal with it, but it doesn't fix the issue of "my bills are going up while my income can't". I'm sure retired me will be glad for it if it makes it that far, and we don't somehow end up being taxed to the hilt on _that_ too when we eventually get there.
EDIT: does > doesn't