Yes, I guess only Indian applicants are referred to ECU i.e. Economic classification Unit or something like that.... it was on qorax thread, I dont remember the exact abbreviation now...
I also saw one case where singapore office issued 6-12 months wait letter. So london and singapore up till now, as per my knowledge. Even Indians on their thread showed concern that why NDVO is not giving any response, whereas Paki applicants, with same timelines, are getting responses in form of these letters from London....
Since its July, I think soon we will see some posts sharing good news
May God bless us all....