Now she prays five times a day and wears a full burkha and spends hours deep in study of the Qu'ran.
But despite her dedication she has been banned from her local mosque by elders who she claims said she would have to pray with the men.
The 5ft 10in ex-labourer says she always knew she was different but did not have her operation until three years ago.
Lucy, who now lives in Swindon, said: "I always felt different and felt like I was in the wrong body.
"I told my mum and she was shocked to say the least.
"It just was not the done thing so I just put it to the back of my head and try and forget about it."
Lucy signed up to the TA arm of the Royal Gloucestershire, Berkshire and Wiltshire Regiment in 2006 at the age of 21 to try and make himself more manly.
But it only made her more depressed.
"I tried to do macho things you know to stop how I was thinking, but it didn't work because I was trying to be someone I wasn't," she said.
"I felt differently to others - I was attracted to men,
"They say I am the first transgender Muslim but I bet there are more - they are just frightened," she said.
She says she has been banned from the Broad Street mosque by thoughtless worshippers who were offended by her gender.
She said: "The way they treated me was disgusting.
"They asked me questions about my bra cup size, asked about my Adam's apple, about my period and asked to see my birth certificate.
"They said I had to pray with the men so I left and pray at home instead.
"I hope people will change their attitudes and other people like me will realise they are free to just be themselves."
A spokesman for Swindon Mosque said: "Everybody is welcome, as long as they behave according to Islam." The question for you is should lucy be banned from the mosque? is it appropriate for a man to become a woman in islam? I would like comments from all religions please and dont forget to fill in the " reaction" boxes, Many thanks and regards, A+ A.
