Online retailers wage war over the most convenient click-and-collect service Retail giants are crossing swords over the battle to win to best click-and-collect service for savvy online shoppers It's wasn't just another manic Monday for high street retail giants alike, as yesterday morning marked the beginning of the busiest online shopping day in the run-up to Christmas: Mega Monday. It follows in the footsteps of the hugely successful American Black Friday bonanza, and offers cash-strapped customers a window of opportunity to rake in pre-Christmas discounts - naturally, it's timed conveniently around November's pay day. READ: Black Friday: 10 best fashion and beauty deals For high street retailers such as John Lewis, Boots and Asda, special promotional sales weren't the only cause worth drawing their cyber swords over; with high growth in e-commerce sales comes the demand for an even better click-and-collect service. As such, retailers are going to great lengths to make sure their online services are gilded in the latest cutting edge technology. At John Lewis, 'Never Knowingly Undersold' took on the form of a £65m distribution centre dedicated to their click-and-collect service, which now accounts for nearly 60 per cent of their online orders. The mighty Milton Keynes warehouse is the size of 14 football pitches where 1,400 staff churn out 120,000 individual items, 24-hours a day, seven days a week. READ: John Lewis's plans to recreate the British high street Meanwhile Amazon stepped up to the plate with a controversial move to fill in Transport for London's proposed redundancy of ticket offices with their Amazon Lockers. The trial has been successfully tested in Hammersmith and allows customers to pick up their online orders on their commute home. Over at Asda, the supermarket has reached a lucrative deal with TFL to open a network of click-and-collect points in the car parks of six London Underground stations. Perhaps inching its way closer to Tesco's innovative subway E-shop, which lets South Korean customers build up an E-shopping bag by simply scanning glass shelves, embedded with QR codes before their train arrives. Much to the delight of their hungry and time-constricted customer, their shopping will promptly arrive as they walk through the door. Whatever will retailers think of next? Maybe some form of hovering spacecraft that plonks your order on your doorstep within half an hour. But that would be a bit silly, wouldn't it?