according to wiki, statistics from the 2001 UK census showed that there were 747,285 people recorded as being of pakinstani descent living in the UK, this will by now surely have increased slightly, so allowing for the under 16s with no income, there is probably quite alot of the money being donated coming from people in the UK who have family and other ties to Pakistan, so there is probably a good chance they will be raising money for the disaster fund on a more long term basis that the current emergency appeal.