as an Addendum here is some information from the British Governments website:

Special information for transit/transfer passengers regarding liquids

If your journey involves changing flights at an EU airport, or at an airport in Norway, Iceland or Switzerland, special restrictions apply.

You may only take liquids (including duty free) through security at your connecting airport if one of these rules apply:

they meet all the requirements for passengers leaving from an EU airport or an airport in Norway, Iceland or Switzerland – see hand baggage rules

they have been bought airside at an airport in the EU, Norway, Iceland or Switzerland or on board an aircraft operated by an EU carrier or one from Norway, Iceland or Switzerland - liquids must be in a tamper-proof bag provided by the airport/airline, unopened, and must contain a receipt that shows the item was bought on the day of travel

they have been purchased airside at Changi Airport in Singapore or Dubrovnik, Rijeka, Pula, Zadar or Zagreb airports in Croatia where special arrangements are in place - liquids must be in a tamper-proof bag provided by the airport, unopened, and must contain a receipt that shows the item was bought within the last 36 hours

source: http://www.direct.gov.uk/en/TravelAn...heUK/DG_078169