The two plants, with a combined workforce of over 370, had sales of 42m last year. Amcors nine existing UK manufacturing sites turned over 150m.
An Amcor spokeswoman said it was too early to determine the plans for the sites, although European chief executive Graham James revealed that the Thetford plant would be known as Amcor Flexibles Camvac.
Thetford specialises in high barrier vacuum metallising and coating, while Ledbury operates in the bakery and produce markets.
Rexam said the disposal would "sharpen" its focus on medical packaging and the pharmaceutical and personal care sectors.
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"Well done all involved... great to see the investment to increase the productivity in the same footprint- much more sustainable than popping another one up."
"From 1949 until the late 2000s Remploy had a network of government-subsidised factories that offered employment specifically to disabled people, originally often war veterans or victims of industrial..."
"Does appear an odd decision as with that level of shareholder funds they would be liable for the staff redundancy and cover the insolvency costs. It’s not like they could take the money and dodge..."
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