Have also sent this to you in a pm. Took it from a dwp leaflet.
Going abroad permanently
· You must tell us straight away if you, your child, children, or all of
you leave the UK permanently or for an absence that is likely to last
for more than a year when you leave.
· If you are going abroad permanently but your child is staying in the
UK and living with someone else, the person they are living with
should get in touch with us to claim Child Benefit.
Going abroad temporarily
You will be treated as being abroad temporarily if your absence isunlikely to last more than a year when you leave.
If you go abroad temporarily, you can continue to get Child Benefit:
· for up to eight weeks, whatever the reason for your absence
· for the first 12 weeks you are abroad if you go or stay abroad
because you are, or a member of your family is, receiving
treatment for an illness or disability or because a member of your
family has died.
You can make a new claim to Child Benefit while you are abroad
temporarily, so long as you are ordinarily resident in the UK.
Hope this helps.