Good interview. Just think about your tags - you've not used the words 'Immingham Museum', ''N E Lincs', 'history', 'heritage', 'railways', and so on. All I would say is you've let the man talk and you needed to take control and jump in there. Also it would have been good if you had described some of the things. Comes down to planning and thinking about what you intend to get out of it.