I had a friend whose husband moved to UK first and she followed with the kids 6 months later after the house was sold.. She claimed the child benefit here until she went but then had to repay it all before she could get in the UK. You have to claim where you are paying prsi so even though she was still living here with the kids it did not matter.
That makes no sense. If she was living here with her children she was entitled to the CB, unless it was being claimed in the husbands name. Just because he moved, her entitlement does not change, she wasn't paying prsi in the UK.