I never got working tax credits as my husband earned too much, but we did get a little child tax credit which has slightly different criteria. You can't claim this until baby is here and you are claiming child benefit. Child Benefit is about £80 per month which pretty much everyone gets unless one of you earn over £45,000 a year. The government have introduced lots of changes this year and it seems we won't get as much help with our second child, if anything!
If your OH works and gets a decent salary you prob won't get much, dont think it's fair when both me and my husband have worked all our lives, paid tax and NI and get very little, if anything! Not fair especially when you have a mortgage to pay and other costs along with owning your own home