I'm always interested in the advice to catch the early Eurostar trains. It seems most advised a black cab. We, family of 3, planned to take the 6:00am Tuesday underground from Earls Court station (Piccadilly line) to St. Pancras for the 7:55am to Paris. We are just staying 1 night so our "luggage" will fit in our purse/bag, and we'll be back to London Wednesday night. Should we also consider a cab? I'm assuming it's only a 30 min. commute by underground. Thanks for your advice!