Time Out says
The pedestrianized shopping haven in Soho is always inventive with its Christmas decorations, and this huge event featuring discounts, live music and free in store activities is a fitting celebration for their 'switch on'. Tickets for the party are free but must be claimed in advance – it's well worth the effort because dozens of shops, restaurants and bars in the area will be offering a 20 percent discount on the night.
Find more Christmas lights in London
Find more festive fun with our guide to Christmas in London