Apologies for the delay in getting back to you. The smaller city i live in isn't able to deal with requests of this nature and it wasn't until this week that i went to the provincial capital for a wedding that i had that opportunity to visit the relevant office.

The results were disappointing. As with your own experience the officials stated that my son should be 18years old and able to make the decision regarding giving up their Chinese nationality themselves. I've also spoken to a Chinese couple i know who are emigrating to Canada in the near future with their son (5years old) and he too will not be able to cancel his Chinese citizenship until he reaches adulthood.

I'm still awaiting a reply from the British Embassy on the matter.