Please share the details then. It would help a lot of people.
For UK: go to this website
http://www.ukba.homeoffice.gov.uk/visas-immigration/do-you-need-a-visa/
It says: YES, you generally need a visa to transit the UK
Exception:
'Transit without visa' concession - DATV exemptions
If you are a national of a country covered by the DATV system (Pakistan Included), you may be able to transit the UK airside without a visa. To qualify for this exemption:
- you must arrive and depart by air; and
- your onward flight must be confirmed, and must depart within 24 hours; and
- you have proper documentation for your destination, including a visa if necessary.
Additionally, you must hold:
1) a valid entry visa for Australia, Canada, New Zealand or the USA, and a valid airline ticket for travel via the UK, as part of a journey to or from one of those countries;
Source: http://www.ukba.homeoffice.gov.uk/visas-immigration/transitthroughtheuk/visa-transit-airside/