_______________________________________________________________________________________________________I am an american visiting London and was walking around the Marble Arch, King Cross area at 09:00am on Sunday morning. I did a search at google.com for car hire central London on my iPhone. I called the Tipoa Car Hire telephone number and was told that I had to use the internet to make a reservation. I made it clear I wanted a car now and I was only on a mobile phone, but they repeated, it was the only way to make a reservation with them. Nevertheless, I did go to their website and in fact i downloaded their FREE iPhone / iPad APP. I found this free APP very useful as it pin-pointed precisely on the map where I was, which was great as I wasn't sure how far I had walked and where the nearest rental car locations where. Cut a long story short I made a reservation to collect a car at Marble Arch in one hour's time (10:00 am) and drop the car at Bristol Airport, 4 days later. Including the one-way fee, I was charged €184, which i thought wasn't bad as a one-way British Rail ( Great Western) train ticket was €75. On this occasion and my first booking, I was super impressed with Tipoa Car Hire..