I think that is correct, a local enthusiast reckoned it has been passed fit for the rest of the year; more comebacks than Tiger Woods and Frank Sinatra! Enjoy seeing it in steam though, and any chance to see them at speed is great as they were well capable of hauling heavy trains at high speed on the East Coast Main Line.
Attached is a link to the 'Ebor Streak' with 4464 'Bittern' proving the point at 90+ MPH in 2013; turn the sound up and enjoy that haunting chime whistle as it passes through Doncaster at 75 MPH.
https://www.youtube.com/watch?v=3Ez5og1iFU8