The UK's first drive-through supermarket is being launched by Tesco this week.

But drivers will not be steering their vehicles up and down the aisles. The service, being tested at a Tesco Extra store in Baldock, Hertfordshire, allows customers to order their groceries online and pick them up at the supermarket without leaving their car. Staff will pack the shopping into the boot.

The concept, which if successful could be rolled out across the country, is aimed at customers who want the convenience of online shopping but don't have time to wait at home for their groceries to be delivered.

Laura Wade-Gery, chief executive of Tesco.com and Tesco Direct, said: "This will be especially popular with busy mums who have the school run and children's activities to manage.

"It also offers a solution to parents who want to avoid the challenge of shopping in a busy store with children in tow but can't afford the time to stay in for the shop to arrive at their door."

Online customers choose the "click and collect" option and book a two-hour collection slot. A flat £2 charge will apply instead of the sliding scale of home delivery charges, which begin at £3.