Why did our staff save up for a Spitfire? Discover our contribution to the war effort and how we helped fund the rebuilding of our nation. Interested in NS&I's heritage? Discover more on our NS&I Flickr page. Follow - https://www.flickr.com/photos/nsandi Other useful links: NS&I website - http://bit.ly/1hqVrLi Contact us - http://bit.ly/1hqVR4n We welcome comments on our videos. Please be mindful of our social media policy: http://bit.ly/nsandi-social-media-policy Credits: Images supplied by Getty and the Advertising Archives. Colossus image © Crown. Reproduced by kind permission, Director, GCHQ. Audio media supplied by Pond5.com, Freesound, Audio Network, Kippertie, iStock.com. Created by The Team for NS&I.