We will be taking the 6:50 AM Eurostar to Brussels on 15 Sept. Our rental is about equally distant from the West Kensington and West Brompton tube stations. We are trying to decide if it would be better at that time of day to simply book a taxi from our rental or walk to a tube station and take the tube. We understand that we should be at the station for check-in by at least 6:05 am (instead of the 30 minutes stated on the web site) Not really sure how long it would take at that time of day by either tube (with the associated walking) or by taxi. If booking a taxi, we would want to pre-book for pickup that morning (anyone have experience with the Taxicode UK Taxi booking app?)
Any suggestions or insight are greatly appreciated. Thanks in advance.