Santander: Lewis Hamilton TV Ad

A new Santander advert has been recently showing a massive bridge being made from lego bricks featuring Lewis Hamilton. The CGI looks really convincing and realistic or is it CGI? The ad has that 'wow' factor that stays in your head because of the setting and what is being built. I have heard many people talking about it so I decided to go and investigate.

I Found out that It was created by WCRS (WCRS LINK)to which I understand is a marketing agency and The Mill (Mill)who made the CGI. I also found a video on how the ad was made.