Rather strange occurrence, thought I'd give a heads up. Dropped my wife off in the car to go to William Rose around 5pm this afternoon. Not long had the door been shut a young, slightly dishevelled looking lady opened the passenger door and asked to be taken to Heathrow. Told her I wasn't a taxi at which point she said 'No, I need you to take me to Heathrow' and started to get in the car. Given the fact that a Fiat would make a crap taxi anyway and she had no bags my alarm bells went off. Not really fancying having her in the car I quickly accelerated a couple of feet before braking so she lost her footing and moved away. Shut the door, drove up the street a few yards and called 101 and reported it. Tried to keep an eye on her until the police arrived but she walked off up Blackwater Street rather quickly. Soon after I realised my wifes laptop bag and my phone were in the passenger footwell so she may have spotted them and been after those. Thought it worth a heads up. She was probably late twenties, black and in dark ripped & grubby clothing.