For anybody not familiar with train spotting, it consisted of getting a book which contained every number of every locomotive operating in a specific area which, in my case, was the Eastern Region.
As you saw a locomotive, you simply underlined it in the book. To a non-train enthusiast, this would all seem rather pointless however, if you were like me, you would spend many happy hours not only hoping to see locomotives not seen before, but would be absorbing all the sights and sounds of steam locomotives!
Kettering and Wellingborough (which were now within my cycling range) were part of the Midland Region, so a whole different range of locomotives would run through there and dictate me getting an appropriate train spotting book.
Eventually, I had reasons to have all four books (covering the 4 British Railways Regions) and, as a statement of some authority (?) they were all in a dark blue plastic binder especially made for the job! I was no ordinary train spotter!