Five women who helped cracked Hitler's code have now opened up about the kind of work that they did during the war-time.
87-year-old, Margaret Mortimer, from Broadmayne in Dorset joined the Bletchley Park Wrens a week after she left her school, Daily Express reported.
She said that she was left with disappointment after she joined the Wrens, asshe had thought that if she joined the Wrens it would have something to do with the Navy and it wasn't remotely connected.
Instead all she did was feed the tape into Colossus and adjust the machine.
She also revealed that they worked in shifts of eight hours with a quick lunch break.
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Another women, Margaret O'Connell, who is now 87 was posted to Bletchley Park after she joined the Wrens at 17.
O'Connell said that life was very regimented, and she recalled marching to the local church. She explained that the girls had been divided into watches and did one week of mornings, one week of nights, one mixed week, then had a long weekend off.
O'Connell, who worked on Colossus said that if the tape they were feeding to the machine broke they had to stick it back together with adhesive.
88-year-old, Lorna Cockayne, joined the Colossus C watch team at Bletchley Park when she was 18; her chief responsibility was to feed tape into Colossus and as she remembers it was non-stop.
Now 87, Margaret Kelly, joined the Wrens at 18, said that she enjoyed the work as she knew it was important but it was quite demanding as they had to be very accurate.
88-year-old, Joanna Chorley, from Buckinghamshire was also a member of C watch later helped prepare the Wrens for life after the war.
The girls' were paid 1.50 pounds a fortnight.
