Apologies if there's already a thread on this, and not sure if it belongs under history & nostalgia or traction & rolling stock, but as I mention in post 134 on page 5 of the thread on unbelievable rolling stock diagram allocations at www.railforums.co.uk/threads/your-experiences-of-unbelievable-rolling-stock-diagram-allocations-past-and-present.203340/page-5 trains formed of "scratch sets" or "scratch rakes" (i.e. sets of coaches that looked as if they had just been coupled together at random) were quite common in the days before fixed formation sets became the norm (so probably until about the mid to late 1980s, but you still sometimes used to see such formations in the early 1990s and to a much lesser extent even more recently than that).
Examples of scratch sets included:
West Coast Main Line trains formed of a mixture of Mark 2s and Mark 3s (which I guess could have caused chaos with the seat reservation system unless a certain number of seats were always left unreserved to allow for this). This seemed to be especially common with Euston to Liverpool, Manchester and Glasgow trains. I think the Birminghams, Wolverhamptons and Shrewsburys were pretty much always Mark 2s, though.
Trains formed of a mixture of Mark 1s and Mark 2s.
Trains formed of a mixture of non-air-conditioned and air-conditioned Mark 2s.
Trains with more brake end vehicles (BSOs, BSKs, BFKs or BCKs) than were needed.
Trains with more First Class than was needed (in which case some of the First Class coaches would often have window labels saying "For the use of passengers travelling Second Class").
You even occasionally used to see trains with coaches at least two eras apart in the same set. For example Mark 1s and air-conditioned Mark 2s (I mean ordinary Mark 1 passenger coaches as opposed to Mark 1 buffet cars in trains of Mark 2 aircons) or Mark 3s and non-aircon Mark 2s.
First generation DMUs were also often formed of vehicles from two or more different classes of unit and could perhaps also be described as scratch sets (see also the thread on 1st gen DMUs at www.railforums.co.uk/threads/1st-gen-dmu’s.203611/).
Examples of scratch sets included:
West Coast Main Line trains formed of a mixture of Mark 2s and Mark 3s (which I guess could have caused chaos with the seat reservation system unless a certain number of seats were always left unreserved to allow for this). This seemed to be especially common with Euston to Liverpool, Manchester and Glasgow trains. I think the Birminghams, Wolverhamptons and Shrewsburys were pretty much always Mark 2s, though.
Trains formed of a mixture of Mark 1s and Mark 2s.
Trains formed of a mixture of non-air-conditioned and air-conditioned Mark 2s.
Trains with more brake end vehicles (BSOs, BSKs, BFKs or BCKs) than were needed.
Trains with more First Class than was needed (in which case some of the First Class coaches would often have window labels saying "For the use of passengers travelling Second Class").
You even occasionally used to see trains with coaches at least two eras apart in the same set. For example Mark 1s and air-conditioned Mark 2s (I mean ordinary Mark 1 passenger coaches as opposed to Mark 1 buffet cars in trains of Mark 2 aircons) or Mark 3s and non-aircon Mark 2s.
First generation DMUs were also often formed of vehicles from two or more different classes of unit and could perhaps also be described as scratch sets (see also the thread on 1st gen DMUs at www.railforums.co.uk/threads/1st-gen-dmu’s.203611/).




