Originally Posted by
EvilDoctorK
If you do get a Black Cab or Uber rather than a fixed rate cab make sure they don't drive you around the M25 .. while that may take around the same amount of time it's more than twice the distance so the only one happy with that route will be the cabbie !
Which, interestingly, is exactly what Uber just quoted for when I did a dummy booking. Heading North onto the M25 and back around for ~£120.
When I added a 'stop' in central london and then on to Heathrow the price dropped to ~£60