This is the second time I read Collision Course. To my disappointment a lot of the references to the 1970s that were in previous editions were removed (X films, cheap bus fares (by today's standards), vinyl records, cassettes, £1 notes and payphones) leaving a mismatch of past and present times. I think the 70s references add spice to it and future generations might be interested in every day things people took for granted in the past. The Kindle edition uses the 2009 version published by Back to Front (this is obvious from the cover) although the Kindle version was published by CB Creative Books and does not mention when it was first published (1976).
The first edition I read was the 1995 version published by Penguin under their Puffin brand I loaned from a library and that said it was slightly edited. I later learned that Penguin toned down the language with most of the profanity removed or replaced with euphemisms which was not so bad compared with modernizing it. Penguin otherwise remained mostly faithful to the first edition. I am speaking as someone too young to remember the 1970s. This is probably like the colourisation of black and white films or the editing of popular films such as Star Wars and ET. Buddy (1982) which is from the same author remains un edited to my knowledge and I think modernizing it would be controversial. What you feel about modernization of old books might depend on whether you read the old or new versions first.
Another possible flaw was a lack of proofreading I have also found in other Kindle books that are not in the paper editions such as spaces missing. In the Kindle edition there are spaces missing, wrong figures used and Mr. Raines is incorrectly labeled as the RE teacher instead of the PE teacher.
On the other hand it was good to see Collision Course on Kindle.