80X carry an onboard adapter coupling too, meaning in theory any loco can rescue them. They also have the relevant onboard systems for the difference in braking systems.No that's not correct. The Thunderbirds are there to respond to all incidents and rescues. Adapter couplings are available either from the Thunderbird itself or by the relevant TOC/FOC as required.
They didn’t collect the 91 just the coaching set that the 91 was on when it failed. NL26 and 82223 with one 67 on each end67027 and 67023 are on site at Hitchin Up Yard to finally rescue 91110.