Each passenger is permitted to carry ONE item of cabin baggage through the airport security search point ... handbags may be carried within the single item of cabin baggage.
No liquids of any type are permitted through the airport security search point ...The definition of liquids includes gels, pastes, lotions, liquid/solid mixtures and the contents of pressurised containers, e.g. toothpaste, hair gel, drinks, soups, syrups, perfume, deodorant, shaving foam, aerosols, etc.
Other prohibited items:
You may purchase liquids, gels and pastes (i.e. toothpaste) and solid cosmetics (i.e lipstick) from shops and restaurants after airport security and take these onto the aircraft as long as they all fit into your ONE carry on hand baggage item.
Sheesh. No getting around that I will have to trust the baggage handlers at Heathrow then with my possessions, even though I could carry (well, pull along on wheels) everything instead and not have to wit around for the plane to be unloaded.
and easy money for BAA and the airport shops ...
Update: I'm now doing more searching and (and I really shouldn't be so surprised by this) I'm finding contradictory statements depending upon which page I look at and the route I took to that page. ;-0