We (two) need to travel from Stroud to Heathrow in October. Our flight departure is at 11:30 (AM). The train will cost £188 (for two -- off-peak price not available). I found two car services that offer the trip at £110. That would seem more convenient and less expensive. They are Express Airport Transport (http://www.transfers-heathrow-airport.com/) and London Drivers 247 Ltd.(londondrivers.com/taxi-stroud-heathrow-airpo…). Has anyone had experience with either of these? Any other suggestions?