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If you look at the vehicle history entries you will see that a lot of them contain the above information, showing which vehicles were replaced by new vehicles entering service, and what the replacement for vehicles going out of service was. I should point out that this information is not actually shown in the source documents (mainly LT Variation Sheets). However, if a vehicle enters service at location X with department Y on date Z, then a similar one leaves service from the same at around the same date, then it is safe to assume that there was a direct replacement. I am considering making this information into hyperlinks (so that you can 'click through' chains of vehicles) but the problem is that there is often not a one-for-one relationship. |