I'm sure I recall one of the senior Tyseley guys saying on camera recently it's more practical and economical for a mainline steam operator to develop a fleet with common parts, design ethos etc, hence Tyseley is concentrating on its GWR fleet. It's not they don't like the loco, but disposing to another operator with deep experience of similar or identical machines is more likely to keep Jubilees represented on the mainline, and keep the skills and knowledge together to keep the class operating or even existing elsewhere into the future. It's a necessary business decision based on sound engineering judgement, in my humble opinion. Understandably, people get very attached to particular locomotives but I think we have to rationalise that a fleet of locos is little more than a huge collection of components bolted together that can change drastically each time the loco visits works for a major overhaul every few years where it is completely dismantled and reerected. That's the same in preservation, just as it was in frontline service. The A1 Steam Trust is using an identical boiler for the P2 new build as was installed on their A1, Tornado. The original P2s had a custom boiler of otherwise similar dimensions but with a longer barrel by about 18 inches. A1ST decided commonality of spares on such a critical component was more important than absolute authenticity (better not start that argument on this particular loco as they're incorporating numerous engineering refinements!) so they're going for a slightly longer smokebox in the new design, albeit disguised by the boiler casing. They're absolutely happy with the steam output capability of their A1 boiler in service with its 50 square foot grate, especially at the higher A1 pressure they're also upgrading the P2 to work at, and have ordered a spare boiler as well as the one for the P2. The intention is to run two large locos with three boilers, overhauling alternately as required and always having a spare boiler ready that can be swapped in to speed up return to service. So the question remains whether one particular new loco joining a fleet of similar machines necessarily means one of the identities will be lost. This is by no means certain, but I think there's a trend here of fleet consolidation across the sector and a greater focus on the engineering and operating practicalities involved in mainline steam operations.