This is a cut and post from ba.com:
Restricted items needing no notification
The following list covers all items that may be carried on British Airways flights but are still restricted to specific limits on quantities or dimensions:
Aerosols – non-flammable for sporting and home use
Non-radioactive medicinal or toilet articles – hairsprays, perfumes, colognes, medicines, etc.
Alcoholic beverages
Non-flammable, non-toxic gas cylinders – e.g. for operation of mechanical limbs, bicycle tyre inflation devices (max. capacity 50ml)
Devices containing lithium cells or batteries – laptop computers, cameras, camcorders, etc.
Spare lithium batteries (less than 100 Wh)
Annecdotal evidence suggests the TSA in the states have different rules, and will remove them.
So you should be ok in your HOLD luggage for Europe.