So what did she fail on, and whose fault was it?
I dunno
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I'll have to wait until SWWLTBO returns for the inquest.
She is consoling THW over a sandwich and taking her to skool, then she will go shopping and return gawd knows when.
I am
not bothered used to being the last to know around here.
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Things may get thrown!
I found mentioning "I passed first time" most satisfying.... 
I never took a test .... RAF Section Commander wandered through the office one morning and said "M.O Tells me you are getting a lot of headaches, he reckons they are caused by working in the office with the neon lights so you can be my driver" and threw the keys to his Service Land Rover at me.
"But Sir ~ I don't have a licence"
"Well take the Land Rover across to MT and get them to teach you, Sergeant write this man a chit for driving instruction and I'll sign it"
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One hour later I presented myself to the Corporal I/C Driving Instruction and handed him my chit.
"'Owjewgetere?"
"I drove across the airfield in the Guv'nor's Land Rover"
"
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Well youse can fuckin' drive then carn't yer ... Foller me"
Into his cubby hole at the back of the garage .... He sits on an oil drum and writes on a form.
"Name?"
"SAC Snoopy, Corporal"
"I can see yer fuckin' rank on yer fuckin' arm ... Full Name?"
He scrawls an illegible signature on the form and walks off to get the M.T. Officer to sign it and returns to hand me the document.
"There yer go lad .... You are now licensed to drive a Service Land Rover"
I was 17 years and 2 months old.
Over the next year or so I was given a licence for every vehicle the RAF operated (a separate licence for each type of vehicle was required) and on demob exchanged them all for a civvy licence by sitting a "Rehab Driving Course" with another Corporal, who simply signed forms which I sent off to get a full UK Driving Licence.
No I don't think it would be kind or wise to tell the THW that was how easy it was.