Is this still accurate info? I usually travel with a carry on plus a large purse/tote that I doubt I could stuff in my carry on even to make it through security.
You are allowed 1bag only, at European airport and this is enforced rigorously. You'll be OK coming into the UK from the US, but after that, including in transit, its 1 bag only. You are at liberty to put one bag inside the other if it fits and then take out the other side of security, since the 1 bag rule is a security rule, not an airline rule.