Amazon.com Inc has begun surveying UK customers about their use of restaurant delivery services, in what analysts said was likely the first step in an international expansion of a business it rolled out in the United States last September.

In recent days, the online retailer sent its customers surveys, seen by Reuters, asking about the frequency and cost of customers' food orders and also whether they used companies such as Just Eat, Hungry House and Deliveroo, which deliver prepared food such as pizza, sushi and kebabs.

The surveys asked customers what they most liked about providers such as Just Eat and Hungry House, and "what can be improved most about these service providers?"