The train was made of 500,000 bircks and is the work of Duncan Titmarsh, the only certified Lego Professional in the UK, and his team at Bright Bricks.
It showcased a series of special effects – all three carriages lit up, as did the lights on a Lego Christmas tree housed in the train’s third carriage. A smoke machine was installed within the train, enabling its aptly coloured red funnel to emit smoke.
Children could hop on the train and snap a photo of themselves next to the driver or a Christmas Elf dressed in green, and fake snow covered the creation at intervals throughout the day.
Titmarsh said the whole train weighed in at 1.7 tonnes, and that it was one of the most complex projects the company has worked on.
The Lego Santa Express 'drove' out of Covent Garden last Sunday (29 November) after a three-day tenure.
This locomotive is Lego’s fifth annual Christmas inspired creation. The company launched the campaign with a 30-metre Lego Christmas tree in 2011, meanwhile other creations have included a giant advent calendar, walk-through snow globe and Santa’s sleigh with reindeer in 2014.
View our gallery of the train the day it was positioned in Covent Garden here.