Hi Tony et al,
With all due respect to Mick Whelan,the Miles is not in a good state of preservation.It is in a passable state, given that it lives in an ancient,bird-infested,non-temperature/moisture controlled atmosphere.It's casein glue construction material just "loves" that atmosphere.If it goes to the National and gets an indoor berth, it will be kept in the atmosphere it needs to ensure it's longevity.The only saving grace of it's present position is that it's out of direct rainfall and sunlight.Has it's engine been properly preserved? Have the metal fittings and instruments been protected? Mick can't do everything and be every where.A fairly urgent anti-corrosion programme is needed for all the items in the Museum, otherwise they'll deteriorate in short order.
regards
GttC