Hallo zusammen,
anbei die aktuellste Info der englischen Department of Transport Seite:
"These arrangements apply to all passengers starting their journey at a UK airport and to those transferring from international flights at a UK airport.
Each passenger is permitted to carry ONE item of cabin baggage through the airport security search point. The dimensions of this item must not exceed: a maximum length of 45 cm, width of 35 cm and depth of 16 cm (17.7"×13.7"×6.2" approx) (including wheels, handles, side pockets etc.). Other bags, such as handbags, may be carried within the single item of cabin baggage. All items carried by passengers will be x-ray screened.
No liquids of any type are permitted through the airport security search point, other than the following items:
Prescription medicines in liquid form sufficient and essential for the flight (e.g. diabetic kit), as long as verified as authentic
Baby milk and liquid baby food (the contents of each bottle or jar must be tasted by the accompanying passenger).
... In addition to the above, passengers boarding flights to the USA and items they are carrying, including those acquired after the central screening point, will be subjected to secondary search at the gate. Any liquids discovered will be removed from the passenger."
Link:
http://www.dft.gov.uk/stellent/groups/dft_about/documents/page/dft_about_612280.hcsp