I have rented cars abroad many times in Europe, but my experience with Europcar in London was exceptionally troublesome and disappointing. I strongly advise against choosing this company in London. From the very beginning, the car pickup staff try to sell insurance and make intimidating remarks, followed by complicated processes involving various fines, and ending with a series of email hassles related to returning the car. For such a large company, their London branch is full of pitfalls, fines, and inexplicable issues that will cause you significant trouble. The service and overall experience are extremely poor. Among all the car rental companies I have used many times, this one is by far the most frustrating and stressful. Renting a car is supposed to enhance convenience, especially when traveling abroad where there may already be language barriers, but this company will ensure you deal with endless issues during your trip. Choose wisely, and I strongly suggest avoiding this company in London.