There's a note on one of them, 3am 25th March 1953: https://coimages.sciencemuseumgroup.org.uk/images/290/874/medium_YINH090__0022_.jpg https://coimages.scienc

There's a note on one of them, 3am 25th March 1953: https://coimages.sciencemuseumgroup.org.uk/images/290/874/medium_YINH090__0022_.jpg https://coimages.sciencemuseumgroup.org.uk/images/290/874/me... http://news.bbc.co.uk/onthisday/hi/dates/stories/march/24/newsid_2785000/2785265.stm http://news.bbc.co.uk/onthisday/hi/dates/stories/march/24/ne...