One of my most memorable journeys dates back to early 1980, when the Persil company had a promotion allowing one railway ticket free when one was purchased. So I bought one 1st class return from Witham to Cheltenham for a weekend visit to my sister. I was of course accompanied by my wife, and 3 daughters all aged less than 5 years. They would have been 3 years, 18 months, and 3 months approx. Equipment included a double buggy and a carry-cot. And of course appropriate luggage. At Witham we joined a 1st class compartment, where the sole occupant, a well-to-do lady welcomed us. Travel to Cheltenham, using the Circle line to Paddington, changing at Swindon was fairly uneventful. The 1st class area in whatever DMU it was that took us from Swindon the Cheltenham was up front behind the driver.
The return trip was more fun, and may touch on the question etiquette. It was a tight connection at Swindon, so we had to board the HST at the back in the Standard Class area and walk through to 1st class. I remember having the carry-cot with baby in front of me and towing the folded double buggy behind me. Fortunately in 1st class we found a table free with seats for 4. Having stowed the equipment, it was difficult to prevent the 2 older girls from running up and down the carriage. Businessmen were working and reading their papers. (No laptops or phones in those days). It became necessary for my wife to breast feed the baby.
The train manager entered the carriage at the far end and started checking the tickets. I had the distinct sense that the other 1st class travellers were thinking "this will sort them out"! Of course I was able to present my valid paid for 1st class ticket, and the associated complimentary (courtesy of Persil) 1st class ticket, so our journey was not disrupted.
Do you think there were any breaches of etiquette?