Alas it only takes a simple peek at wiki to find belief does not match the facts....
Wiki page for Donnington wrote:The Melbourne Loop was built in 1985 to increase the lap distance to 2.5 miles (4.02 km) and allow the track to host Grand Prix motorcycle races – at 1.957 miles (3.149 km) without the loop, the circuit was deemed too short. This shorter layout remains as the National circuit, which is used for most non-Grand Prix events.
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2010 ... resurrect the circuit, not only rebuilding the removed track sections, but also renewing infrastructure. This included the re-alignment of Foggy's bend, but not the old Dunlop Bridge
http://en.wikipedia.org/wiki/Donington_Park