From the Eurocontrol CFMU website:
SYSTEM FAILURE IN PRESTWICK CENTER - UPDATE
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SITUATION HAS DETERIORATED IN PRESTWICK CENTER. PROBLEMS WITH THE
ELECTRONIC FLIGHT DATA PROCESSING SYSTEM HAVE NOT BEEN SOLVED YET.
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ALL SECTORS ARE REGULATED AT REDUCED RATES AND THEY ARE APPLIED
FORTHE WHOLE DAY.
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TOTAL DELAY CAUSED BY PRESTWICK EFD FAILURE IS AROUND 140000 MIN