Myrddin
Yes, two of the chicks were slightly lazy last year and took a while to get their feeding habits perfected! However they all managed to leave the nest during the first week in September to migrate to north / west Africa. They’ll spend two years in Africa and then make their way back to the UK to find a partner and breed, they should aim to return to their place of birth although this is never guaranteed and they could end up elsewhere in the UK.
Hope this helps?
Geraint