Hello I think the British auto industry went to inch fasteners in the mid to late fiftys.  Before that they used the Witworth size bolt.  In 1956 when the MG car company introduced their new model called the MG A it had inch bolts.  The models before that i think had Witworth bolts.  I believe the new Mini is metric i will phone the Mini dealer in Vancouver and find out.  I know the new Jag is metric.  I don't think there is a Lotus dealer in Vancouver that i can phone.  Another large British company that uses all metric fasteners is Perkins Diesel. Their models all used to use inch fasteners but they have all switched to metric.  I don't know if Perkins ever used Witworth fasteners. Another British company that has gone to metric fasteners is Lister Petter. They also make diesel engines. John Mercer.              

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